1.Introduction To date,the application of lithium-ion batteries(LIBs)has been expanded from traditional consumer electronics to electric vehicles(EVs),energy storage,special fields,and other application scenarios.The ...1.Introduction To date,the application of lithium-ion batteries(LIBs)has been expanded from traditional consumer electronics to electric vehicles(EVs),energy storage,special fields,and other application scenarios.The production capacity of LIBs is increasing rapidly,from 26 GW·h in 2011 to 747 GW·h in 2020,76% of which comes from China[1].展开更多
The dissolution of transition metal(TM)cations from oxide cathodes and the subsequent migration and deposition on the anode lead to the deconstruction of cathode materials and uncontrollable growth of solid electrode ...The dissolution of transition metal(TM)cations from oxide cathodes and the subsequent migration and deposition on the anode lead to the deconstruction of cathode materials and uncontrollable growth of solid electrode interphase(SEI).The above issues have been considered as main causes for the performance degradation of lithium-ion batteries(LIBs).In this work,we reported that the solid oxide electrolyte Li1.5Al0.5Ti1.5(PO4)3(LATP)coating on polyethylene(PE)polymer separator can largely block the TM dissolution and deposition in LIBs.Scanning electron microscopy(SEM),second ion mass spectroscopy(SIMS),and Raman spectroscopy characterizations reveal that the granular surface of the LATP coating layer is converted to a dense morphology due to the reduction of LATP at discharge process.The as-formed dense surface layer can effectively hinder the TM deposition on the anode electrode and inhibit the TM dissolution from the cathode electrode.As a result,both the LiCoO2/SiO-graphite and LiMn2O4/SiO-graphite cells using LATP coated PE separator show substantially enhanced cycle performances compared with those cells with Al2O3 coated PE separator.展开更多
The rapid development of lithium-ion batteries(LIBs)is faced with challenge of its safety bottleneck,calling for design and chemistry innovations.Among the proposed strategies,the development of solid-state batteries(...The rapid development of lithium-ion batteries(LIBs)is faced with challenge of its safety bottleneck,calling for design and chemistry innovations.Among the proposed strategies,the development of solid-state batteries(SSBs)seems the most promising solution,but to date no practical SSB has been in large-scale application.Practical safety performance of SSBs is also challenged.In this article,a brief review on LIB safety issue is made and the safety short boards of LIBs are emphasized.A systematic safety design in quasi-SSB chemistry is proposed to conquer the intrinsic safety weak points of LIBs and the effects are accessed based on existing studies.It is believed that a systematic and targeted solution in SSB chemistry design can effectively improve the battery safety,promoting larger-scale application of LIBs.展开更多
基金supported by funding from the Strategic Research and Consulting Project of the Chinese Academy of Engineering(2022-XZ-15)。
文摘1.Introduction To date,the application of lithium-ion batteries(LIBs)has been expanded from traditional consumer electronics to electric vehicles(EVs),energy storage,special fields,and other application scenarios.The production capacity of LIBs is increasing rapidly,from 26 GW·h in 2011 to 747 GW·h in 2020,76% of which comes from China[1].
基金the National Key R&D Program of China(Grant No.2016YFB0100100)the National Natural Science Foundation of China(Grant Nos.51822211,U1932220,U1964205,and U19A2018).
文摘The dissolution of transition metal(TM)cations from oxide cathodes and the subsequent migration and deposition on the anode lead to the deconstruction of cathode materials and uncontrollable growth of solid electrode interphase(SEI).The above issues have been considered as main causes for the performance degradation of lithium-ion batteries(LIBs).In this work,we reported that the solid oxide electrolyte Li1.5Al0.5Ti1.5(PO4)3(LATP)coating on polyethylene(PE)polymer separator can largely block the TM dissolution and deposition in LIBs.Scanning electron microscopy(SEM),second ion mass spectroscopy(SIMS),and Raman spectroscopy characterizations reveal that the granular surface of the LATP coating layer is converted to a dense morphology due to the reduction of LATP at discharge process.The as-formed dense surface layer can effectively hinder the TM deposition on the anode electrode and inhibit the TM dissolution from the cathode electrode.As a result,both the LiCoO2/SiO-graphite and LiMn2O4/SiO-graphite cells using LATP coated PE separator show substantially enhanced cycle performances compared with those cells with Al2O3 coated PE separator.
基金Project supported by the National Key Research and Development Program of China(Grant No.2021YFB2500300)。
文摘The rapid development of lithium-ion batteries(LIBs)is faced with challenge of its safety bottleneck,calling for design and chemistry innovations.Among the proposed strategies,the development of solid-state batteries(SSBs)seems the most promising solution,but to date no practical SSB has been in large-scale application.Practical safety performance of SSBs is also challenged.In this article,a brief review on LIB safety issue is made and the safety short boards of LIBs are emphasized.A systematic safety design in quasi-SSB chemistry is proposed to conquer the intrinsic safety weak points of LIBs and the effects are accessed based on existing studies.It is believed that a systematic and targeted solution in SSB chemistry design can effectively improve the battery safety,promoting larger-scale application of LIBs.
