Improving the electrochemical performance of LiMnPO4/C by liquid nitrogen quenching
Improving the electrochemical performance of LiMnPO4/C by liquid nitrogen quenching
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液氮淬火提高LiMnPO4/C电化学性能
DOI：
10.1016/j.matlet.2013.07.112
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发表时间：
2013-11
影响因子：
3
通讯作者：
Liu, Jiequn
中科院分区：
文献类型：
--
作者：
Wu, Ling;Zhong, Shengkui;Lv, Fan;Liu, Jiequn
采用溶胶-凝胶法结合球磨和液氮淬冷法制备了LiMnPO 4/C正极材料。XRD结果表明，淬火并没有破坏LiMnPO 4的结构。与未淬火样品相比，淬火样品具有单一橄榄石型LiMnPO 4相，其晶格参数a，bandc略有收缩。SEM和粒度分析结果表明，淬火可以抑制LiMnPO 4/C颗粒的生长和团聚。TEM结果表明，LiMnPO 4晶体中存在大量的缺陷.电化学测试表明，液氮淬冷能显著提高LiMnPO 4/C的电化学性能。淬火样品在0.05、0.1、0.5和1 C倍率下的初始放电容量分别为131.6、125.8、103.3和56.4 mAh g− 1，远高于未淬火样品。
LiMnPO4/C cathode material is prepared by a sol–gel combined ball milling and liquid nitrogen quenching method. XRD results reveal that quenching does not destroy the structure of LiMnPO4. The quenched sample, which is well crystallized with a single olivine type LiMnPO4phase, shows a slightly contracted lattice parameters ofa,bandccompared with the un-quenched sample. SEM and particle size analysis results reveal that quenching can inhibit the growth and agglomeration of LiMnPO4/C particles. TEM results show that quenching can result in the formation of a number of defects in LiMnPO4crystals. Electrochemical tests indicate that liquid nitrogen quenching can greatly improve the electrochemical performances of LiMnPO4/C. The quenched sample shows the initial discharge capacities of 131.6, 125.8, 103.3 and 56.4 mAh g−1at 0.05, 0.1, 0.5 and 1 C rates, respectively, which are much higher than those of un-quenched one.
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影响因子：
9.2
作者：
Liu, H.;Li, C.;Wu, H. Q.
通讯作者：
Wu, H. Q.
影响因子：
3
作者：
Ling Wu;Shengkui Zhong;Jie-qun Liu;Fan Lv;K. Wan
通讯作者：
Ling Wu;Shengkui Zhong;Jie-qun Liu;Fan Lv;K. Wan
影响因子：
9.2
作者：
Drezen, Thierry;Kwon, Nam-Hee;Exnar, Ivan
通讯作者：
Exnar, Ivan
影响因子：
4
作者：
Therasa Kim;Don-Kyu Kim;Hyun-Wook Ryu;J. Moon;Jung-Min Lee;Seung-Hwan Boo;Jung-Chul Kim
通讯作者：
Therasa Kim;Don-Kyu Kim;Hyun-Wook Ryu;J. Moon;Jung-Min Lee;Seung-Hwan Boo;Jung-Chul Kim
影响因子：
--
作者：
Li, GH;Azuma, H;Tohda, M
通讯作者：
Tohda, M