Synthesis and electrochemical properties of nanostructured LiAIxMn2-xO4-yBry particles

Authors

Yudai Huang, Xi'an Jiatong University, China
Rongrong Jiang, Xinjiang University, China
ShuJuan Bao, Xinjiang University, China
Zhifang Dong, Xinjiang University, China
Yali Cao, Xinjiang University, China
D Z. Jia, Institute of Applied Chemistry, China
Zaiping Guo, University of WollongongFollow

RIS ID

31447

Publication Details

Huang, Y, Jiang, R, Bao, S, Dong, Z, Cao, Y, Jia, DZ & Guo, Z (2009), Synthesis and electrochemical properties of nanostructured LiAIxMn2-xO4-yBry particles, Journal of Solid State Electrochemistry, (13), pp. 799-805.

Abstract

Nanostructured LiAl_xMn_2−xO_4−yBr_y particles were synthesized successfully by annealing the mixed precursors, which were prepared by room-temperature solid-state coordination method using lithium acetate, manganese acetate, lithium bromide, aluminum nitrate, citric acid, and polyethylene glycol 400 as starting materials. X-ray diffractometer patterns indicated that the particles of the as-synthesized samples are well-crystallized pure spinel phase. Transmission electron microscopy images showed that the LiAl_xMn_2−xO_4−yBr_y samples consist of small-sized nanoparticles. The results of galvanostatic cycling tests revealed that the initial discharge capacity of LiAl_0.05 Mn_1.95O_3.95Br_0.05 is 119 mAh g⁻¹; after the 100th cycle, its discharge capacity still remains at 92 mAh g⁻¹. The introduction of Al and Br in LiMn₂O₄ bring a synergetic effect and is quite effective in increasing the capacity and elevating cycling performance.