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ACS Appl Mater Interfaces. 2016 Jan 13;8(1):208-14. doi: 10.1021/acsami.5b08349. Epub 2015 Dec 24.

Fabrication and Performance of High Energy Li-Ion Battery Based on the Spherical Li[Li(0.2)Ni(0.16)Co(0.1)Mn(0.54)]O2 Cathode and Si Anode.

Author information

1
Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing, Jiangsu 210093, China.
2
Soochow University , Center of Suzhou Nanoscience and Technology, College of Physics, Optoelectronics and Energy and Collaborative Innovation, Suzhou, Jiangsu 215006, China.
3
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan.

Abstract

The cathode materials of Li-ion batteries for electric vehicles require not only a large gravimetric capacity but also a high volumetric capacity. A new Li-rich layered oxide cathode with superior capacity, Li[Li0.20Ni0.16Co0.10Mn0.54]O2 (denoted as LNCM), is synthesized from precursor, a coprecipitated spherical metal hydroxide. The preparation technology of precursor such as stirring speed, concentration of metal solution, and reaction time are regulated elaborately. The final product LNCM shows a well-ordered, hexagonal-layer structure, as confirmed by Rietveld refinement of X-ray diffraction pattern. The particle size of the final product has an average diameter of about 10 μm, and the corresponding tap density is about 2.25 g cm(-3). Electrochemical measurements indicate that as-prepared LNCM has great initial columbic efficiency, reversible capacity, and cycling stability, with specific discharge capacities of 278 and 201 mAh g(-1) at 0.03 and 0.5 C rates, respectively. Cycling at 0.1 C, LNCM delivers a discharge capacity of 226 mAh g(-1) with 95% retention capacity after 50 cycles. Si/LNCM cell is fabricated using Si submicroparticle as anode against LNCM. The cell can exhibit a specific energy of 590 Wh kg(-1) based on the total weight of cathode and anode materials.

KEYWORDS:

coprecipitation method; lithium-ion battery; lithium-rich layered oxide; silicon anode; spherical cathode

PMID:
26651500
DOI:
10.1021/acsami.5b08349

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