High-Performance Lithium-Ion Cathode LiMn0.7Fe0.3PO4/C and the Mechanism of Performance Enhancements through Fe Substitution

被引：55

作者：

Ding, Bo ^{[1
,2
]}

Xiao, Pengfei ^{[3
]}

Ji, Ge ^{[3
]}

Ma, Yue ^{[1
,2
]}

Lu, Li ^{[3
]}

Lee, Jim Yang ^{[1
,2
]}

机构：

[1] NUS Grad Sch Integrat Sci & Engn NGS, Ctr Life Sci CeLS, Singapore 117456, Singapore

[2] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore

[3] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 22期

关键词：

lithium-ion battery; cathode materials; solid-state reaction; mechanism; ion substitution; LIMNPO4; COMPOSITES; ROUTE; MN;

D O I：

10.1021/am403991f

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

LiMn1-xFexPO/C (x = 0 and 0.3) with a uniform carbon coating and interspersed carbon particles was prepared by a high-energy ball-milling (HEBM)-assisted solid-state reaction. The as-synthesized LiMn0.7Fe0.3PO4/C delivered an excellent rate performance as a LiMnPO4 class of materials. Specifically, the specific discharge capacity was 164 mAh/g (96% of theoretical value) at the 0.05 C rate and 107 mAh/g at the 5 C rate (1 C = 170 mA/g). Electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT) measurements indicated improvements in the transport of electrons and Li+ as well as the emergence of a single-phase region in lithium extraction and insertion reactions.

引用

页码：12120 / 12126

页数：7

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