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Effects of Mn( II ) on nano silicon@polyaniline electrodes in both half and full cells
Author(s) -
Chen Haihui,
Xu Hanying,
Zeng Yingying,
Cai Jinhua,
Liu Limin,
Ma Tianyi,
Wang Fang,
Qiu Xinping
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6102
Subject(s) - faraday efficiency , polyaniline , anode , silicon , electrolyte , materials science , electrode , cathode , fade , lithium (medication) , chemical engineering , nanotechnology , chemistry , composite material , optoelectronics , engineering , polymerization , polymer , medicine , computer science , operating system , endocrinology
Summary In situ growing conductive polyaniline (PANi) has been regarded as a functional binder to enhance the performance of silicon based anodes in half cells, while few papers discussing the influence of Mn 2+ from cathode on full cells. In this paper, the effects of Mn 2+ on NSi@PANi electrodes in both half and full cells are investigated, and the mechanism for the fast capacity fade of LiMn 2 O 4 /NSi@PANi full cell is elucidated. Results reveal that the full cell will significant accelerate the capacity fade of NSi@PANi anode, and the extra consumption of active Li + and electrolytes caused by the deposited Mn 2+ on silicon anodes in lithium manganate (LMO)/NSi@PANi full cells is confirmed as the main reason of the capacity fade and lower coulombic efficiency for the excessive growth of solid electrolyte interphase.