Preparation and electrochemical performance of LiFePO4/C microspheres by a facile and novel co-precipitation
Preparation and electrochemical performance of LiFePO4/C microspheres by a facile and novel co-precipitation
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简便新颖的共沉淀法制备LiFePO4/C微球及其电化学性能
DOI：
10.1016/j.electacta.2015.03.163
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发表时间：
2015-06
影响因子：
6.6
通讯作者：
Huayu Lu
中科院分区：
文献类型：
--
作者：
Kaixiong Xian;Youliang Zhang;Chunlong Li;Huayu Lu
在高温油浴中，采用共沉淀法成功地合成了LiFePO4和LiFePO4/C微球。用X射线衍射仪、扫描电子显微镜和透射电子显微镜对其形貌和结构进行了研究。LiFePO4/C微球的直径在2~4μm之间均匀，由尺寸在30~80 nm之间的纳米粒子组成。纳米粒子被一层薄的纳米碳层包裹，并嵌入到三维纳米碳网络中。LiFePO4/C微球表现出高的敲击密度(1.82g/cm−3)，在0.1C倍率下的可逆放电容量达到165mA/g−1，在50C倍率下的优异倍率性能达到106mA/g−1，即使在50C倍率下，20次循环的容量保持率也超过98%。因此，该材料是一种潜在的高功率锂离子电池候选材料。
LiFePO4and LiFePO4/C microspheres are successfully synthesized via facile co-precipitation in an elevated temperature oil bath. Their morphologies and structures are investigated by X-ray diffractometer, scanning electron microscope and transmission electron microscope. LiFePO4/C microspheres are uniform between 2 and 4 μm in diameter and composed of nanoparticles from 30 to 80 nm in size. Nanoparticles are coated by a thin nano-carbon layer and imbedded into three-dimensional nano-carbon networks. LiFePO4/C microspheres exhibit a high tap density (1.82 g cm−3), deliver large reversible discharge capacity of 165 mA h g−1at 0.1C rate, excellent rate capability of 106 mA h g−1at 50C rate, and capacity retention over 98% after 20 cycles even applied 50C rate. Therefore, the material is a potential candidate for high-power lithium ion batteries.
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影响因子：
3.9
作者：
Nan Zhou;Nan Zhou;Nan Zhou;E. Uchaker;Hai-yan Wang;M. Zhang;Suqin Liu;You-nian Liu;Xiongwei Wu-Xi
通讯作者：
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影响因子：
16.6
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
Shi‐Yong Yang;Xufeng Zhou;Jiangang Zhang;Zhaoping Liu
影响因子：
3.9
作者：
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通讯作者：
S. Oh;H. Bang;Seung‐Taek Myung;Y. Bae;Seong-Man Lee;Yang‐Kook Sun
影响因子：
6.6
作者：
Oh, Sung Woo;Myung, Seung-Taek;Sun, Yang-Kook
通讯作者：
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