One-pot mechanical synthesis of the nanocomposite granule of LiCoO2 nanoparticles
One-pot mechanical synthesis of the nanocomposite granule of LiCoO2 nanoparticles
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DOI：
10.1016/j.apt.2014.03.005
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发表时间：
2014-07-01
影响因子：
5.2
通讯作者：
Iba, Hideki
中科院分区：
文献类型：
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作者：
Kondo, Akira;Nakamura, Eri;Iba, Hideki
采用机械一锅法在不加热的条件下成功合成了由初级纳米颗粒组成的层状岩盐型LiCoO 2颗粒。使用电子显微镜观察到的初级纳米颗粒和颗粒的尺寸分别为50-200 nm和20 μ m。通过STEM-EELS对一次粒子的表面性质进行了评价，结果表明一次粒子表面存在锂缺陷。还通过STEM-EDX评价了电解质向颗粒中的渗透行为，这表明电解质不能完全渗透到颗粒中。用合成的LiCoO 2颗粒组装的锂离子电池的首次充电和放电容量分别为140和120 mA h/g。讨论了合成的LiCoO 2颗粒的颗粒结构与电化学性能之间的关系。(c)2014由Elsevier B. V.代表日本粉末技术学会出版。版权所有
The layered rock-salt LiCoO2 granules consisted of the primary nanoparticles were successfully synthesized by one-pot mechanical method without external heating. The sizes of the primary nanoparticle and the granule observed using electron microscopy were 50-200 nm and 20 mu m, respectively. The surface property of the primary nanoparticle was evaluated by STEM-EELS, which revealed that the primary particle possesses the lithium defective part at the surface. The penetration behavior of an electrolyte into the granule was also evaluated by STEM-EDX, which indicated that the electrolyte could not fully penetrate into the granule. The first charge and discharge capacities of Li-ion cell assembled with the synthesized LiCoO2 granules were 140 and 120 mA h/g, respectively. The relationship between the particle structures of the synthesized LiCoO2 granules and the electrochemical properties were discussed. (c) 2014 Published by Elsevier B.V. on behalf of The Society of Powder Technology Japan. All rights reserved