المؤلفون: Lumin Zheng, Haoyi Yang, Ying Bai, Chuan Wu, Yaning Gao, Yu Li

المصدر: Journal of Energy Chemistry. 67:613-620

مصطلحات موضوعية: Battery (electricity), Materials science, Aqueous solution, Energy Engineering and Power Technology, Electrolyte, Overpotential, Electrochemistry, Cathode, law.invention, Fuel Technology, Chemical engineering, law, Faraday efficiency, Energy (miscellaneous), Electrochemical window

الوصف: The exertion of superior high-energy density based on multivalent ions transfer of rechargeable aluminum batteries is greatly hindered by limited electrochemical stability window of typical water in salt electrolyte (WiSE). Recently, it is reported that a second salt addition to the WiSE can offer further suppression of water activities, and achieves a much wider electrochemical window compared with aqueous WiSE electrolytes. Hence, we demonstrate a class of water in bi-salt electrolyte containing the trifluoromethanesulfonate (OTF), which exhibits an ultra-wide electrochemical window of 4.35 V and a very low overpotential of 14.6 mV. Moreover, the interface chemistry between cathode and electrolyte is also confirmed via kinetic analysis. Surprisingly, we find the electrolyte can effectively suppress Mn dissolution from the cathode, alleviate self-discharge behavior, and ensure a stable electrode–electrolyte interface based on the interface concentrated-confinement effect. Owing to these unique merits of water in bi-salt electrolyte, the AlxMnO2·nH2O material delivers a high capacity of 364 mAh g−1 and superb long-term cycling performance > 150 cycles with a capacity decay rate of 0.37% per cycle with coulombic efficiency at ca. 95%.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::51688b45424542969c54eb54fdbc2f50Test
https://doi.org/10.1016/j.jechem.2021.11.003Test

المؤلفون: Chuan Wu, Xinran Wang, Yang Yue, Ying Bai, Haoyi Yang

المصدر: Journal of Energy Chemistry. 64:144-165

مصطلحات موضوعية: Materials science, Energy Engineering and Power Technology, chemistry.chemical_element, Nanotechnology, Electrolyte, Electrochemistry, Sulfur, Cathode, law.invention, Anode, chemistry.chemical_compound, Fuel Technology, chemistry, Electrochemical reaction mechanism, law, Dissolution, Polysulfide, Energy (miscellaneous)

الوصف: Multivalent metal–sulfur (M-S, where M = Mg, Al, Ca, Zn, Fe, etc.) batteries offer unique opportunities to achieve high specific capacity, elemental abundancy and cost-effectiveness beyond lithium-ion batteries (LIBs). However, the slow diffusion of multivalent-metal ions and the shuttle of soluble polysulfide result in impoverished reversible capacity and limited cycle performance of M−S (Mg–S, Al–S, Ca–S, Zn–S, Fe–S, etc.) batteries. It is a necessity to optimize the electrochemical performance, while deepening the understanding of the unique electrochemical reaction mechanism, such as the intrinsic multi-electron reaction process, polysulfides dissolution and the instability of metal anodes. To solve these problems, we have summarized the state-of-the-art progress of current M−S batteries, and sorted out the existing challenges for different multivalent M−S batteries according to sulfur cathode, electrolytes, metallic anode and current collectors/separators, respectively. In this literature, we have surveyed and exemplified the strategies developed for better M−S batteries to strengthen the application of green, cost-effective and high energy density M−S batteries.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::579333796f1b2a37d7caca7a2ee6d7f4Test
https://doi.org/10.1016/j.jechem.2021.04.054Test

المؤلفون: Mingda Gao, Li Xu, Chuan Wu, Ying Bai, Hui Li, Xinran Wang, Xue Qing

المصدر: Journal of Energy Chemistry. 59:666-687

مصطلحات موضوعية: Materials science, Thermal runaway, Nucleation, Energy Engineering and Power Technology, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Energy storage, 0104 chemical sciences, Anode, Dendrite (crystal), Fuel Technology, chemistry, Electrochemistry, Lithium, 0210 nano-technology, Faraday efficiency, Energy (miscellaneous)

الوصف: The dependence on portable devices and electrical vehicles has triggered the awareness on the energy storage systems with ever-growing energy density. Lithium metal batteries (LMBs) has revived and attracted considerable attention due to its high volumetric (2046 mAh cm−3), gravimetric specific capacity (3862 mAh g−1) and the lowest reduction potential (−3.04 V vs. SHE.). However, during the electrochemical process of lithium anode, the growth of lithium dendrite constitutes the biggest stumbling block on the road to LMBs application. The undesirable dendrite not only limit the Coulombic efficiency (CE) of LMBs, but also cause thermal runaway and other safety issues due to short-circuits. Understanding the mechanisms of lithium nucleation and dendrite growth provides insights to solve these problems. Herein, we summarize the electrochemical models that inherently describe the lithium nucleation and dendrite growth, such as the thermodynamic, electrodeposition kinetics, internal stress, and interface transmission models. Essential parameters of temperature, current density, internal stress and interfacial Li+ flux are focused. To improve the LMBs performance, state-of-the-art optimization procedures have been developed and systematically illustrated with the intrinsic regulation principles for better lithium anode stability, including electrolyte optimization, artificial interface layers, three-dimensional hosts, external field, etc. Towards practical applications of LMBs, the current development of pouch cell LMBs have been further introduced with different assembly systems and fading mechanism. However, challenges and obstacles still exist for the development of LMBs, such as in-depth understanding and in-situ observation of dendrite growth, the surface protection under extreme condition and the self-healing of solid electrolyte interface.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::94759279b1c0bdd8f744c883c7f64f03Test
https://doi.org/10.1016/j.jechem.2020.11.034Test

المؤلفون: Minghao Zhang, Chuan Wu, Feng Wu, Ying Bai, Yu Li, Zhaohua Wang

المصدر: Journal of Materials Chemistry A. 9:10780-10788

مصطلحات موضوعية: Materials science, Passivation, Renewable Energy, Sustainability and the Environment, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, 0104 chemical sciences, Carboxymethyl cellulose, Anode, chemistry, Chemical engineering, Specific surface area, medicine, General Materials Science, 0210 nano-technology, Carbon, Faraday efficiency, medicine.drug

الوصف: Porous carbon materials are regarded as one of the most promising candidates for sodium-ion batteries (SIBs) due to their fast sodium storage performance. However, the inadequate initial coulombic efficiency (ICE) resulting from the large specific surface area still hinders the commercialization of porous carbon anodes. Thus, it is important to synthesize porous carbon anodes with high electrochemical performance and improved ICE. Here we prepare a nitrogen and oxygen rich porous carbon material (NOPC) and construct a uniform passivation layer using a sodium carboxymethyl cellulose (CMC) binder on the surface of the NOPC material. The uniform passivation layer effectively deactivates the functional groups and suppresses the decomposition of electrolytes, resulting in an excellent ICE of 90%, which is ultrahigh and competitive among the reported carbon-based anodes in SIBs. Specifically, the as-prepared porous carbon anode delivers a reversible capacity of 191.7 mA h g−1 after 1000 cycles at 10 A g−1 with a capacity retention of 90%. This work suggests a general method to improve the ICE of a carbon material and hopefully facilitates the commercialization process of SIBs.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::3a6dae1f6d7b457a86df7d8a8456245eTest
https://doi.org/10.1039/d1ta00845eTest

المؤلفون: Chuan Wu, Yaning Gao, Ying Bai, Haoyi Yang

المصدر: Journal of Materials Chemistry A. 9:11472-11500

مصطلحات موضوعية: Battery (electricity), Aqueous solution, Materials science, Renewable Energy, Sustainability and the Environment, 02 engineering and technology, General Chemistry, Pourbaix diagram, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Energy storage, 0104 chemical sciences, Chemical engineering, General Materials Science, 0210 nano-technology, Dissolution, Electrochemical window

الوصف: Aqueous rechargeable metal ion batteries (ARMBs), featuring safety, facile manufacturing and environmental benignity, have recently attracted extensive attention as promising energy storage systems. Particularly, the pursuit of electrode materials with abundance, low-cost and high capacity has directed the focus on Mn-based oxides for ARMBs. However, some barriers stand in the way of the development of Mn-based oxides for ARMBs, such as inherent poor electrical conductivity and rapid capacity degradation due to Jahn-Teller distortion and Mn2+ dissolution. Besides, the electrochemical window of aqueous electrolytes is too narrow to maximize the full potential of Mn-based oxides. In this review, we summarize recent developments of Mn-based oxides in aqueous batteries based on univalent ions (e.g., Li+ and Na+) and multivalent ions (e.g., Mg2+, Zn2+, and Al3+) as charge carriers. To be specific, we start with the introduction of crystal structures of Mn-based oxides reported so far, and outline the main shortcomings and the electrochemical reaction mechanisms (e.g., chemical conversion or intercalation) in combination with analysis of the Pourbaix diagram. Then research progress of Mn-based oxides in different battery systems is interpreted in detail indexed by the cation charge carrier. We highlight the prevalent optimization methods based on the electronic structure, morphology, additive, electrode–electrolyte interface, etc. for superb electrochemical performances. Finally, we systematically compare the applications in different battery systems with particular emphasis on battery energy density and discuss the reason behind the differences in terms of electrochemistry. And the research trends including electrode materials, electrode–electrolyte interfaces and high-concentration electrolytes are delineated for on-going studies.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::76c71a365c6b7ad0e43d2d73f0bc854dTest
https://doi.org/10.1039/d1ta01951aTest

المؤلفون: Na Zhu, Liming Ling, Liumin Suo, Hong Li, Huajie Xu, Chuan Wu, Zhaohua Wang, Yaning Gao, Shuainan Guo, Feng Wu, Ying Bai, Haoyi Yang

المصدر: Journal of Energy Chemistry. 51:72-80

مصطلحات موضوعية: Battery (electricity), Anatase, Materials science, Energy Engineering and Power Technology, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Cathode, 0104 chemical sciences, law.invention, chemistry.chemical_compound, Fuel Technology, chemistry, Chemical engineering, law, Ionic liquid, Electrochemistry, Ionic conductivity, Cyclic voltammetry, 0210 nano-technology, Mesoporous material, Energy (miscellaneous)

الوصف: Rechargeable aluminum ion battery (AIB) with high theoretical specific capacity, abundant elements and low cost engages considerable attention as a promising next generation energy storage and conversion system. Nevertheless, to date, one of the major barriers to pursuit better AIB is the limited applicable cathode materials with the ability to store aluminum highly reversibly. Herein, a highly reversible AIB is proposed using mesoporous TiO2 microparticles (M-TiO2) as the cathode material. The improved performance of TiO2/Al battery is ascribed to the high ionic conductivity and material stability, which is caused by the stable architecture with a mesoporous microstructure and no random aggregation of secondary particles. In addition, we conducted detailed characterization to gain deeper understanding of the Al3+ storage mechanism in anatase TiO2 for AIB. Our findings demonstrate clearly that Al3+ can be reversibly stored in anatase TiO2 by intercalation reactions based on ionic liquid electrolyte. Especially, DFT calculations were used to investigate the accurate insertion sites of aluminum ions in M-TiO2 and the volume changes of M-TiO2 cells during discharging. As for the controversial side reactions in AIBs, in this work, by normalized calculation, we confirm that M-TiO2 alone participate in the redox reaction. Moreover, cyclic voltammetry (CV) test was performed to investigate the pseudocapacitive behavior.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::c7bf2f89af7808cfdabdadd95fb348eeTest
https://doi.org/10.1016/j.jechem.2020.03.032Test

المؤلفون: Feng Wu, Ying Bai, Haoyi Yang, Chuan Wu

المصدر: Journal of Energy Chemistry. 45:98-102

مصطلحات موضوعية: Materials science, Energy Engineering and Power Technology, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Energy storage, Cathode, 0104 chemical sciences, law.invention, chemistry.chemical_compound, Fuel Technology, chemistry, Aluminium, law, Electrode, Ionic liquid, 0210 nano-technology, Energy (miscellaneous)

الوصف: The past decade has witnessed the germination of rechargeable aluminum batteries (RABs) with the colossal potential to enact as a device for the large scale energy storage and conversion. The Majority of investigations are dedicated to the exploration of suitable cathode materials, while less is known about the electrode/electrolyte interfaces that determine the electrochemistry of batteries. In this perspective, we will highlight the significance of electrode/electrolyte interface for RABs, in overall kinetics and capacity retention. Emphasis will be laid on the complicated yet basic understandings of the phenomena at the interfaces, including the dendrite growth, surface Al2O3 and solid–electrolyte-interphase (SEI). And we will summarize the reported practice in effort to build better electrode/electrolyte interfaces in RAB. In the end, outlook regarding to the challenges, opportunities and directions is presented.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::238f2f106c4992a8af3e1d44f993edc8Test
https://doi.org/10.1016/j.jechem.2019.10.003Test

المؤلفون: Ying Bai, Chuan Wu, Yanxia Yuan, Guanghai Chen, Feng Wu

المصدر: Journal of Energy Chemistry. 37:197-203

مصطلحات موضوعية: Materials science, Hydrogen, Difluoride, Nucleation, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Anode, Metal, Fuel Technology, Chemical engineering, chemistry, visual_art, Electrochemistry, visual_art.visual_art_medium, Dendrite (metal), 0210 nano-technology, Layer (electronics), Energy (miscellaneous)

الوصف: Lithium metal is supposed to be critical material for constructing next-generation batteries due to extremely high capacity and ultralow redox potential. However, the perplexing issue of lithium dendrite growth impedes the commercial application. The initial nucleation and low Li ions diffusion rate in the electrolyte/electrode interface dominate the deposition behavior. Therefore, a uniform and flexible interface is urgently needed. Here, a facile method is proposed to prepare a thin and porous LiF-rich layer (TPL) by the in-situ reaction of small amount of ammonium hydrogen difluoride (NH4HF2) and Li metal. The deposition morphology on Li metal anode with LiF layer is significantly flat and homogeneous owning to low lateral diffusion barrier on LiF crystals and the porous structure of TPL film. Additionally, the symmetrical cells made with such TPL Li anodes show significantly stable cycling over 100 cycles at high current density of 6 mA/cm2. The TPL Li | LiFePO4 full cells keep over 99% capacity retention after 100 cycles at 2.0 C. This approach serves as a facile and controllable way of adjusting the protective layer on Li metal.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::5823fccc53f2f11dcc25a2107c9c66dfTest
https://doi.org/10.1016/j.jechem.2019.03.014Test

المؤلفون: Kun Zhang, Guanjie He, Du Pan, Caiyan Yu, Ying Bai, Xia Lu, Li Li, Rui Zhao, Dandan Wang, Tinghua Xu

المصدر: Nanoscale. 11:8967-8977

مصطلحات موضوعية: Materials science, Spinel, High voltage, 02 engineering and technology, Electrolyte, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Cathode, 0104 chemical sciences, law.invention, Chemical engineering, law, Electrode, Nano, engineering, General Materials Science, 0210 nano-technology, Layer (electronics)

الوصف: LiNi0.5Mn1.5O4 (LNMO) spinel has drawn increasing attention due to its high voltage, stabilized electrochemical performance and safety features as a cathode for lithium-ion batteries. However, the main challenge lies in its unstable surface structure, especially at elevated temperatures. In this paper, we decorate the LNMO precursor with a solid electrolyte of Li1.4Al0.4Ti1.6(PO4)3 (LATP) via a facile sol–gel method, followed by a co-crystallization process at 820 °C, to successfully generate a LATP modification shell at the surface of LNMO. The LATP modification shell could not only optimize the morphology of LNMO including the limitation of particle growth and control of crystalline orientation, but also realize ion doping during the co-crystallization process. By tuning the LATP contents, the 2 wt% LATP modification is found to be the most effective at balancing the interfacial stability and Li+ diffusion kinetics of LNMO, as well as enhancing its rate capability and capacity retention at high temperatures. As a result, the 2 wt% LATP-modified LNMO cathode exhibits a high reversible capacity of 84.8 mA h g−1 after 500 cycles with a capacity retention of 68.9%, and a superior rate capability (102.0 mA h g−1 at 20 C) at room temperature. Moreover, this electrode also delivers a good capacity retention of 85.7% after 100 cycles at 55 °C, which is ascribed to the stabilized interface with a LATP protective layer.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::a88d58aaf451e06ffde8443096dee13bTest
https://doi.org/10.1039/c9nr01655dTest

المؤلفون: Du Pan, Yaping Li, Tinghua Xu, Dandan Wang, Ying Bai, Li Li

المصدر: Ceramics International. 44:17425-17433

مصطلحات موضوعية: Materials science, Process Chemistry and Technology, Oxide, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Cathode, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, law.invention, chemistry.chemical_compound, chemistry, Chemical engineering, law, Electrode, Materials Chemistry, Ceramics and Composites, 0210 nano-technology, Capacity loss, Dissolution, Faraday efficiency

الوصف: Lithium-rich layered materials are promising candidates for next generation Li-ion batteries (LIBs) due to high energy densities, which still, however, suffer low initial Coulombic efficiency (i.e. irreversible initial capacity loss), poor rate capability and capacity retention during cycling. In this work, Li+ conductive Li2SnO3 (LSO) is selected to modify the surface of Li1.2Mn0.56Ni0.17Co0.07O2 (LMNCO) without influencing its bulk structure. Electrochemical characterizations indicate that the obtained LSO@LMNCO electrode shows greatly improved cycling stability and rate capability compared with those of the pristine LMNCO. Intensive aging experiment reveals that the LSO modification layer plays a critical role in performance enhancement, which not only stabilizes the bulk structure of LMNCO in long-term storage/cycling via suppression of metal oxide dissolution, but also benefits the surface kinetics by growth inhibition of solid electrolyte interface (SEI) layer on the particle surface.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::f94f324f2adbc91e4e7ecc8c9132a667Test
https://doi.org/10.1016/j.ceramint.2018.06.209Test