Abstract
High nickel LiNi0.8Co0.15Al0.05O2 (NCA) is one of the most promising cathode materials for next-generation lithium-ion batteries, but its poor structural stability hinders its further development. Here, WO3 coating-modified NCA was successfully prepared by one-step solid phase method, which effectively prevented corrosion of electrolyte. In different dosage ratios, 2.0mol%WO3-NCA sample shows the highest first discharge capacity of 180.4 mAh g−1 at 2 C, and the retention rate was 94.1% after 100 cycles, and more impressively, it exhibits a capacity of 161.1 mAh g−1 even at 5 C, whereas pure NCA only delivers 179.5 mAh g−1 and the retention of 77.1% at 2 C and 147.6 mAh g−1 at 5 C. These results indicate that the WO3 coating plays a role in inhibiting side reactions between NCA and the electrolyte, which improves cycle life of NCA material.
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Funding
This work received support from the Venture & Innovation Support Program for Chongqing Overseas Returnees (No.cx2019128), the Key Project of Science and Technology Research of Chongqing Education Commission of China (No.KJZDK201801103), and the Chongqing Technology Innovation and Application Development project of Chongqing Science and Technology Commission (No.cstc2019jscx-msxmX0358).
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Yang, H., Yang, B., Zhou, L. et al. One-step synthesis of WO3 coating-modified LiNi0.8Co0.15Al0.05O2 cathode material with long cycling stability for lithium-ion batteries. Ionics 28, 1537–1545 (2022). https://doi.org/10.1007/s11581-021-04404-3
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DOI: https://doi.org/10.1007/s11581-021-04404-3