材料科学
电化学
锂(药物)
微珠(研究)
阴极
化学工程
导线
电池(电)
导电体
电导率
功率密度
纳米技术
复合材料
电极
化学
功率(物理)
物理化学
工程类
内分泌学
物理
医学
量子力学
生物化学
作者
Yang Dai,Yuan Fang,Sendan Cai,Lijun Wu,Weijing Yang,Hao Yan,Jun Xie,Jin‐Cheng Zheng,Esther S. Takeuchi,Yimei Zhu
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2016-12-01
卷期号:164 (2): A1-A7
被引量:40
摘要
Among all primary lithium batteries, Li/CFx primary battery possesses the highest energy density of 2180 Wh kg−1. However, a key limitation is its poor rate capability because the cathode material CFx is intrinsically a poor electronic conductor. Here, we developed a so-called "doing subtraction" method to modify the pinecone shaped fluorinated mesocarbon microbead (F-MCMB). The modified fluorinated mesocarbon microbead (MF-MCMB), manifests the advantage of open-framed structure, possesses good electronic conductivity and removes transport barrier for lithium ions. Thus, high capacity performance and excellent rate capability without compromising capacity can be obtained. A capacity of 343 mAhg−1 and a maximum power density of 54600 W kg−1 are realized at an ultrafast rate of 40 C (28A g−1). In addition, the MF-MCMB cathode does not show any voltage delay even at 5C during the discharge, which is a remarkable improvement over the state-of-the-art CFx materials.
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