Synthesis and performance of spherical LiNixCoyMn1-x-yO2 regenerated from nickel and cobalt scraps

Yang, Yue, Huang, Guoyong, Xie , Ming, Xu, Shengming, and He, Yinghe (2016) Synthesis and performance of spherical LiNixCoyMn1-x-yO2 regenerated from nickel and cobalt scraps. Hydrometallurgy, 165 (Part 2). pp. 358-369.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: http://dx.doi.org/10.1016/j.hydromet.201...
 
26
6


Abstract

To reduce the cost of the complex separation process of nickel, cobalt or manganese from the leaching liquid, a high value-adding process for the direct synthesis of LiNi0.8Co0.1Mn0.1O2, LiNi0.5Co0.2Mn0.3O2 and LiNi0.33Co0.33Mn0.33O2 as active cathode materials by the hydroxide co-precipitation method is developed in this paper. The structure, morphology and composition of the regenerated LiNixCoyMn1-x-yO2 cathode materials are determined with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma atomic emission spectrometry (ICP–AES) and energy dispersive X-ray spectroscopy system (EDXS), respectively. The results show that the regenerated cathode materials have a well-defined layered structure and retain the characteristics of their corresponding hydroxide precursors with a spherical morphology and a particle size in the range from 9 to 12 μm in diameter. Electrochemical tests show that the regenerated cathode materials have good electrochemical performances. The initial discharge capacities (0.1C, 2.7–4.3 V) of the regenerated LiNixCoyMn1-x-yO2 are 197.7 mAh g− 1, 174.3 mAh g− 1 and 168.3 mAh g− 1 for x = 0.8, 0.5 and 0.33, respectively. The discharge capacities of all materials decrease with increasing discharging current densities and the capacity retention ratios of LiNi0.8Co0.1Mn0.1O2, LiNi0.5Co0.2Mn0.3O2 and LiNi0.33Co0.33Mn0.33O2 are 86.3%, 95% and 96% respectively after 50 cycles. Overall, the results show that the performances of regenerated LiNixCoyMn1-x-yO2 are similar to those of the materials prepared from mixed solution of virgin nickel, cobalt and manganese chemicals.

Item ID: 43495
Item Type: Article (Research - C1)
ISSN: 1879-1158
Keywords: nickel and cobalt scraps; LiNixCoyMn1-x-yO2; regeneration; electrochemical performance
Funders: National Natural Science Foundation of China (NNSFC), National Natural Science Commission (NNSC), State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (SKL), Program for Changjiang Scholars and Innovative Research Team in University (IRT)
Projects and Grants: NNSFC 51074096, NNSC U1402274, SKL-SPM-201211, IRT13026
Date Deposited: 18 Apr 2016 03:52
FoR Codes: 09 ENGINEERING > 0912 Materials Engineering > 091207 Metals and Alloy Materials @ 100%
SEO Codes: 85 ENERGY > 8506 Energy Storage, Distribution and Supply > 850699 Energy Storage, Distribution and Supply not elsewhere classified @ 100%
Downloads: Total: 6
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page