共查询到20条相似文献,搜索用时 15 毫秒
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Shuang‐Jie Tan Junpei Yue Xin‐Cheng Hu Zhen‐Zhen Shen Wen‐Peng Wang Jin‐Yi Li Tong‐Tong Zuo Hui Duan Yao Xiao Ya‐Xia Yin Rui Wen Yu‐Guo Guo 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(23):7884-7889
Safety concerns are impeding the applications of lithium metal batteries. Flame‐retardant electrolytes, such as organic phosphates electrolytes (OPEs), could intrinsically eliminate fire hazards and improve battery safety. However, OPEs show poor compatibility with Li metal though the exact reason has yet to be identified. Here, the lithium plating process in OPEs and Li/OPEs interface chemistry were investigated through ex situ and in situ techniques, and the cause for this incompatibility was revealed to be the highly resistive and inhomogeneous interfaces. Further, a nitriding interface strategy was proposed to ameliorate this issue and a Li metal anode with an improved Li cycling stability (300 h) and dendrite‐free morphology is achieved. Meanwhile, the full batteries coupled with nickel‐rich cathodes, such as LiNi0.8Co0.1Mn0.1O2, show excellent cycling stability and outstanding safety (passed the nail penetration test). This successful nitriding‐interface strategy paves a new way to handle the incompatibility between electrode and electrolyte. 相似文献
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Nan Sun Qingsong Liu Yi Cao Shuaifeng Lou Mingyuan Ge Xianghui Xiao Wah‐Keat Lee Yunzhi Gao Geping Yin Jiajun Wang Xueliang Sun 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(51):18820-18826
All‐solid‐state batteries have attracted attention owing to the potential high energy density and safety; however, little success has been made on practical applications of solid‐state batteries, which is largely attributed to the solid–solid interface issues. A fundamental elucidation of electrode–electrolyte interface behaviors is of crucial significance but has proven difficult. The interfacial resistance and capacity fading issues in a solid‐state battery were probed, revealing a heterogeneous phase transition evolution at solid–solid interfaces. The strain‐induced interfacial change and the contact loss, as well as a dense metallic surface phase, deteriorate the electrochemical reaction in solid‐state batteries. Furthermore, the in situ growth of electrolytes on secondary particles is proposed to fabricate robust solid–solid interface. Our study enlightens new insights into the mechanism behind solid–solid interfacial reaction for optimizing advanced solid‐state batteries. 相似文献
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