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Effect of Polycarboxylate on Structure and Performance of LiFePO4 Cathode Material(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2012年01期
Page:
58-62
Research Field:
化学
Publishing date:

Info

Title:
Effect of Polycarboxylate on Structure and Performance of LiFePO4 Cathode Material
Author(s):
Mo Xiangyin1; Feng Xiaosan1; Yu Chenjie1; Ding Yi2; Kang Cairong2; Ni Cong2
1.Analysis and Testing Center,Nanjing Normal University,Nanjing 210046,China
Keywords:
lithium rechargeable batteries; cathode material; lithium iron phosphate; polycarboxylate; coating
PACS:
TM912.9
DOI:
-
Abstract:
In order to improve the electrochemical performance of LiFePO4 ，LiFePO4 /C cathode material was synthesized for lithium rechargeable batteries by two step ball-milling and high temperature solid-state reaction，using Li2CO3 ， FeC2O4·2H2O，( NH4 ) 2HPO4 as raw materials and polycarboxylate as carbon source． The effect of different contents of polycarboxylate on the structure and performance of the samples was discussed． On the one hand，the effect of polycarboxylate on crystal structure and surface morphology of LiFePO4 /C composite material was investigated by using X-ray diffraction，and scanning electron microscope /X-ray energy dispersive spectroscopy． On the other hand，electrochemical measurements were used to study the effect of polycarboxylate on charge /discharge performance and cycle stability of LiFePO4 /C composite material． The results indicated that the prepared samples by coating polycarboxylate had single olivine structures and uniform particle sizes，and exhibited excellent electrochemical performances and enhanced stabilities． Among them，the product with polycarboxylate content of 10wt． % showed the best specific discharge capacity and cycle performance，and its first specific discharge capacity was 130. 6 mAh /g at 0. 1C．

References:

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Last Update: 2013-03-11