LiNi0.5Mn1.5O4 Porous Nanorods as High-Rate and Long-Life Cathodes for Li-Ion Batteries

被引：256

作者：

Zhang, Xiaolong ^{[1
]}

Cheng, Fangyi ^{[1
]}

Yang, Jingang ^{[1
]}

Chen, Jun ^{[1
]}

机构：

[1] Nankai Univ, Key Lab Adv Energy Mat Chem, Coinnovat Ctr Chem & Chem Engn Tianjin, Minist Educ,Coll Chem, Tianjin 300071, Peoples R China

来源：

NANO LETTERS | 2013年 / 13卷 / 06期

关键词：

LiNi0.5Mn1.5O4; spinel; porous structure; nanomaterials; Li-ion battery; NANOSTRUCTURED MATERIALS; ELECTRODE MATERIALS; PERFORMANCE; SPINEL; FE; NANOWIRES;

D O I：

10.1021/nl401072x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Spinel-type LiNi0.5Mn1.5O4 porous nanorods assembled with nanoparticles have been prepared and investigated as high-rate and long-life cathode materials for rechargeable lithium-ion batteries. One-dimensional porous nanostructures of LiNi0.5Mn1.5O4 with ordered P4(3)32 phase were obtained through solid-state Li and Ni implantation of porous Mn2O3 nanorods that resulted from thermal decomposition of the chain-like MnC2O4 precursor. The fabricated LiNi0.5Mn1.5O4 delivered specific capacities of 140 and 109 mAh g(-1) at 1 and 20 C rates, respectively. At a 5 C cycling rate, a capacity retention of 91% was sustained after 500 cycles, with extremely low capacity fade (<1%) during the initial 300 cycles. The remarkable performance was attributed to the porous 1D nanostructures that can accommodate strain relaxation by slippage at the subunits wall boundaries and provide short Li-ion diffusion distance along the confined dimension.

引用

页码：2822 / 2825

页数：4

共 33 条

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