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A Co 3 O 4 /C Composite for use as a High‐Performance Lithium‐Ion Battery Anode
Author(s) -
Yang Zhixiong,
Pan Guangxing,
Hu Yuanyuan,
Wu Wanbao,
Cao Miaomiao,
Zhang Xueting,
Zhang Ling,
Zhu Zhenye,
Zhang Jiaheng
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003103
Subject(s) - materials science , composite number , anode , conductivity , calcination , lithium ion battery , battery (electricity) , electrochemistry , lithium (medication) , carbon black , chemical engineering , ion , composite material , electrode , chemistry , thermodynamics , organic chemistry , power (physics) , physics , medicine , natural rubber , engineering , endocrinology , catalysis
Due to advantages such as low environmental impact, low price, and high theoretical specific capacity, Co 3 O 4 has been widely studied. However, its low conductivity and volume expansion during the charging and discharging processes caused pulverization and agglomeration ultimately leads to a rapid decline in battery capacity during the cycle. The creation of nano structured composite of carbon materials and Co 3 O 4 can be used to form a highly conductive matrix that improves the electronic conductivity, and improves the dispersion of Co 3 O 4 to reduce agglomeration and volume expansion. In this work, the rigid conjugated plane structure of 1,10‐phenanthroline was selected to coordinated with cobalt nitrate to form a precursor complex. After heating, the crystal core of Co 3 O 4 becomes more uniform in size with a more regular geometry. Additionally, a calcining temperature of 350 °C was shown to result in an optimal amount of carbon residue that improved electronic conductivity of the whole composite while not excessively hindering lithium‐ion transport. As a result, these properties improved the electron conductivity and protect the crystals from damage caused by volume change during charge and discharge to a certain extent, thus contributing to improved electrochemical performance.