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Surface Structures, Crystal Orientation, and Electrochemical Behavior of Modified LiFePO 4 by Novel Strategies
Author(s) -
Zhang Ying,
Zhang Ronglan,
Xu Feifei,
Zhao Jianshe
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900385
Subject(s) - electrochemistry , materials science , crystallization , chemical engineering , crystal structure , crystal (programming language) , ionic bonding , ionic liquid , carbon nanotube , conjugated system , cobalt , nanotechnology , crystallography , chemistry , organic chemistry , polymer , ion , electrode , catalysis , composite material , programming language , computer science , engineering , metallurgy
Four kinds of novel additives, mononuclear and binuclear amino cobalt metal phthalocyanines combined with carbon nanotubes through physical integration or chemical bonding, are found and serve as structure‐ and morphology‐regulating agents to modify LiFePO 4 . The four kinds of additives with active groups, high‐molecular‐weight, and large conjugated π bonds regulate LiFePO 4 to form four kinds of morphologies dominating in different crystal surfaces and stabilizing the LiFePO 4 structure during crystallization. Herein, overcoming poor ionic properties, electrical conductivity, and poor tap density of LiFePO 4 is focused upon. Specifically, the relationships between regulating additives and dominating morphologies, as well as the electrochemical properties are investigated.