期刊
JOURNAL OF POWER SOURCES
卷 531, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2022.231318
关键词
Oxygen-containing functional groups; Core-shell nano-sphere; Li3 V2 (PO4 )(3 )cathode material; Lithium-ion batteries; N-modified lignin waste liquor
资金
- National Natural Science Foundation of China [21978029, 31770624]
- Liaoning Revitalization Tal-ents Program [XLYC2002024]
- Research Foundation of Educa-tion Bureau of Liaoning Province [LJKZ0525]
- Foundation [GZKF202006]
- State Key Laboratory of Biobased Material
In this study, a carbonaceous layer rich in oxygen-containing functional groups was successfully synthesized from N-doped lignin waste liquor and used as an armor layer to decorate the LVP cathode material, thereby improving the capacity and lifespan of lithium-ion batteries. The champion device exhibited a high initial discharge capacity and excellent capacity retention at high rates.
Simultaneous boosting the lithium ions extraction/insertion kinetics and improving the structural stability of Li3V2(PO4)3 (LVP) cathode material highly determine the capacity and lifespan of lithium-ion batteries (LIBs). Herein, terminal oxygen-containing functional groups enriched carbonaceous layer from N doped lignin waste liquor is successfully demonstrated as the armor layer to decorate LVP with core-shell structures for robust LIBs. To the best of our knowledge, it is the first exploration using N doped lignin waste liquor as carbon source in synthesizing high-performance LVP cathode materials. More importantly, owing to the facilitated reversible V3+/ V4+ redox couple induced by oxygen-containing functional groups aligning with the promoted Li+ kinetic behaviors, the champion device delivered a high initial discharge capacity of 126.9 mA h g+1 (~95% of the theoretical capacity) at 0.5C. Furthermore, the optimized battery displays superior capacity retention of 88.9% after 1000 cycles at a high rate of 10C because of the suppressed crystallization expand and transition metal dissolution.
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