Journal
CHEMELECTROCHEM
Volume 3, Issue 1, Pages 130-137Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201500360
Keywords
coating layer; doping; high rate capability LiNi1/3Co1/3Mn1/3O2; Zr modification
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Funding
- National Natural Science Foundation of China [51302232, 51474196]
- Science & Technology Department of Sichuan Province [2015JY0089]
- Education Department of Sichuan Province [13ZB0205]
- Southwest Petroleum University [X151514KCl01]
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Zr-modified LiNi(1/3)Co(1/3)Mn(1/3-x)ZrxO(2) samples were prepared through a rheological-phase method. The results indicate that there is only partial Zr doping into the bulk phase of the LiNi1/3Co1/3Mn1/3O2 particles, whereas the rest of the Zr remained on the surface to form a Li2ZrO3 coating layer during the Zr-modification process. The Zr-modified LiNi(1/3)Co(1/3)Mn(1/3-x)ZrxO(2) samples show lower discharge specific capacities at low rates, however, which exhibit clearly improved rate capabilities than that of pristine LiNi1/3Co1/3Mn1/3O2. Among the Zr-modified LiNi(1/3)Co(1/3)Mn(1/3-x)ZrxO(2) samples, LiNi1/3Co1/3Mn1/3-0.01Zr0.01O2 (x=0.01) shows the best rate capability, which exhibts158, 142, and 132 mAhg(-1) at 1.0, 2.0, and 3.0 C, respectively. The related results indicate that the doped Zr in pristine LiNi1/3Co1/3Mn1/3O2 could improve the structure stability and the formation of an inactive Li2ZrO3 coating layer which could suppress the interfacial side reaction of LiNi1/3Co1/3Mn1/3O2.
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