Long cycle life of CoMn2O4 lithium ion battery anodes with high crystallinity

Bijelic, Mirjana1; Liu, Xiang2; Sun, Q.2; Djurisic, Aleksandra B.2; Xie, Mao Hai2; Ng, Alan M. C.2,3; Suchomski, Christian4; Djerdj, Igor5; Skoko, Zeljko1; Popovic, Jasminka5

2015

10.1039/c5ta03570h

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

CoMn2O4 nanomaterials are prepared by a low temperature precipitation route employing metal acetates and NaOH. Structural changes, induced by different annealing temperatures, are comprehensively analyzed by X-ray powder diffraction and Raman spectroscopy. With rising annealing temperature the crystal lattice of CoMn2O4 undergoes changes; AO(4) tetrahedra expand due to thermally induced substitution of Co2+ by larger Mn2+ metal ions on the A-site of the spinel structure, while in contrast, BO6 octahedra shrink since the B-site becomes partially occupied by smaller Co3+ metal ions on account of the migrated Mn ions. CoMn2O4 particle sizes are easily fine-tuned by applying different annealing temperatures; the particle size increases with increasing annealing temperature. During the battery operation, pulverization and reduction of particle sizes occurs regardless of the initial size of the particles, but the degree of division of the particles during the operation is dependent on the initial particle properties. Thus, contrary to the common assumption that nanostructuring of the anode material improves the battery performance, samples with the largest particle sizes exhibit excellent performance with a capacity retention of 104% after 1000 cycles (compared to the 2nd cycle).

SCI ; EI

英语

其他

University of Hong Kong[]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000358128100032

ROYAL SOC CHEMISTRY

20152801025451

Annealing ; Anodes ; Crystal structure ; Crystallinity ; Metal analysis ; Metal ions ; Metals ; Particle size ; Precipitation (chemical) ; Sodium hydroxide ; Temperature ; X ray powder diffraction

Metallurgy:531.1 ; Heat Treatment Processes:537.1 ; Thermodynamics:641.1 ; Electron Tubes:714.1 ; Chemical Operations:802.3 ; Crystal Lattice:933.1.1

Web of Science

1.Univ Zagreb, Fac Sci, Dept Phys, Zagreb 10000, Croatia
2.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
3.South Univ Sci & Technol China, Dept Phys, Shenzhen, Peoples R China
4.Univ Giessen, Inst Phys Chem, D-35392 Giessen, Germany
5.Rudjer Boskovic Inst, Div Mat Phys, Zagreb 10000, Croatia

Bijelic, Mirjana,Liu, Xiang,Sun, Q.,et al. Long cycle life of CoMn2O4 lithium ion battery anodes with high crystallinity[J]. Journal of Materials Chemistry A,2015,3(28):14759-14767.

Bijelic, Mirjana.,Liu, Xiang.,Sun, Q..,Djurisic, Aleksandra B..,Xie, Mao Hai.,...&Popovic, Jasminka.(2015).Long cycle life of CoMn2O4 lithium ion battery anodes with high crystallinity.Journal of Materials Chemistry A,3(28),14759-14767.

Bijelic, Mirjana,et al."Long cycle life of CoMn2O4 lithium ion battery anodes with high crystallinity".Journal of Materials Chemistry A 3.28(2015):14759-14767.