高镍三元材料LiNi _(0.8) Co_( 0.1 )Mn _(0.1) O _(2)(NCM811)因在高电压下具有高理论比容量而被广泛应用,与高镍材料如LiNi _(0.5) Co _(0.2) Mn _(0.3) O _(2)(NCM523)、LiNi _(0.6) Co _(0.2) Mn _(0.2) O _(2)(NCM622)等相比存在...高镍三元材料LiNi _(0.8) Co_( 0.1 )Mn _(0.1) O _(2)(NCM811)因在高电压下具有高理论比容量而被广泛应用,与高镍材料如LiNi _(0.5) Co _(0.2) Mn _(0.3) O _(2)(NCM523)、LiNi _(0.6) Co _(0.2) Mn _(0.2) O _(2)(NCM622)等相比存在循环性能差的缺陷。为解决这一问题,提出向碳酸酯电解液中加入电解液成膜添加剂三(三甲基硅烷)硼酸酯(TMSB),以提升NCM811/石墨软包电池的循环性能。结果表明,加入2 wt%TMSB可提高NCM811/石墨软包电池的容量保持率。通过理论计算及形貌表征发现,TMSB能够通过提前氧化还原成膜保护电池电极,从而改善电池循环性能。展开更多
Ferrocenediyldimethylsilane monomer has been synthesized.A series of poly(ferrocenyl dimethylsilanes) with different molecular weights have been prepared by thermal ring\|opening polymerization of 1,1′\|Ferrocenediyl...Ferrocenediyldimethylsilane monomer has been synthesized.A series of poly(ferrocenyl dimethylsilanes) with different molecular weights have been prepared by thermal ring\|opening polymerization of 1,1′\|Ferrocenediyldimethylsilane at different polymerization time. It was found that with increasing polymerization time from 5min to 60min the molecular weights of resultant poly(ferrocenyl dimethylsilanes) increase from M n=1 7×10 4 to M n=1 7×10 5. The reactions of ferrocene with tetracyanoethylene (TCNE) and the reactions of poly(ferrocenyl dimethylsilanes) with tetracyanoethylene (TCNE) were investigated by ESR. A signal with \%g\%≈2 was detected from resultant poly(ferrocenyl dimethylsilane)/TCNE system,which indicates the formation of poly(ferrocenyl dimethylsilane)/TCNE charge transfer complex.展开更多
基金financially supported by the National Key R&D Program of China(No.2021YFA0715802)the Joint Funds of the National Natural Science Foundation of China(No.U19A2088)。
文摘高镍三元材料LiNi _(0.8) Co_( 0.1 )Mn _(0.1) O _(2)(NCM811)因在高电压下具有高理论比容量而被广泛应用,与高镍材料如LiNi _(0.5) Co _(0.2) Mn _(0.3) O _(2)(NCM523)、LiNi _(0.6) Co _(0.2) Mn _(0.2) O _(2)(NCM622)等相比存在循环性能差的缺陷。为解决这一问题,提出向碳酸酯电解液中加入电解液成膜添加剂三(三甲基硅烷)硼酸酯(TMSB),以提升NCM811/石墨软包电池的循环性能。结果表明,加入2 wt%TMSB可提高NCM811/石墨软包电池的容量保持率。通过理论计算及形貌表征发现,TMSB能够通过提前氧化还原成膜保护电池电极,从而改善电池循环性能。
文摘Ferrocenediyldimethylsilane monomer has been synthesized.A series of poly(ferrocenyl dimethylsilanes) with different molecular weights have been prepared by thermal ring\|opening polymerization of 1,1′\|Ferrocenediyldimethylsilane at different polymerization time. It was found that with increasing polymerization time from 5min to 60min the molecular weights of resultant poly(ferrocenyl dimethylsilanes) increase from M n=1 7×10 4 to M n=1 7×10 5. The reactions of ferrocene with tetracyanoethylene (TCNE) and the reactions of poly(ferrocenyl dimethylsilanes) with tetracyanoethylene (TCNE) were investigated by ESR. A signal with \%g\%≈2 was detected from resultant poly(ferrocenyl dimethylsilane)/TCNE system,which indicates the formation of poly(ferrocenyl dimethylsilane)/TCNE charge transfer complex.
