Stable solid-electrolyte interphase(SEI)is crucial for advanced development of lithium metal batteries.However,the continuous collapse and reconstruction of SEI will deplete fresh Li and electrolytes upon cycling,lead...Stable solid-electrolyte interphase(SEI)is crucial for advanced development of lithium metal batteries.However,the continuous collapse and reconstruction of SEI will deplete fresh Li and electrolytes upon cycling,leading to irreversible capacity loss.Herein,we addressed this issue by pre-formation of artificial robust hybrid interphase on a 3D layered graphene/lithium metal framework,in which is constructed by LiF associated with Li2TiF 6generated by the in-situ reaction between the surfacial lithium and titanium fluoride contained electrolytes.The as-obtained interphase can maintain the structure integrality and avoid continuous consumption of the fresh Li and electrolytes.As a consequence,the Li symmetric cells achieve high-efficiency Li deposition and stable cycling over 3600 h.When paired with LiFePO_(4)cathodes,the coin cells exhibit long lifespan(>800 cycles)with almost 88.3%retention of the initial capacity.展开更多
基金supported by the National Key Research and Development Program of China(No.2018YFA0209600)Science and Technology Key Project of Guangdong Province,China(No.2020B010188002)+4 种基金Guangdong Innovative and Entrepreneurial Research Team Program(No.2019ZT08L075)Foshan Innovative and Entrepreneurial Research Team Program(No.2018IT100031)Guangdong Pearl River Talent Program(No.2019QN01L054)National Natural Science Foundation of China(No.22176063)the Fundamental Research Funds for the Central Universities(No.2020ZYGXZR061)。
文摘Stable solid-electrolyte interphase(SEI)is crucial for advanced development of lithium metal batteries.However,the continuous collapse and reconstruction of SEI will deplete fresh Li and electrolytes upon cycling,leading to irreversible capacity loss.Herein,we addressed this issue by pre-formation of artificial robust hybrid interphase on a 3D layered graphene/lithium metal framework,in which is constructed by LiF associated with Li2TiF 6generated by the in-situ reaction between the surfacial lithium and titanium fluoride contained electrolytes.The as-obtained interphase can maintain the structure integrality and avoid continuous consumption of the fresh Li and electrolytes.As a consequence,the Li symmetric cells achieve high-efficiency Li deposition and stable cycling over 3600 h.When paired with LiFePO_(4)cathodes,the coin cells exhibit long lifespan(>800 cycles)with almost 88.3%retention of the initial capacity.
