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Epoxy resin-derived N, P co-doping hard carbon with improved yield and anode performance in Li-ion battery

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Abstract

Electrochemical energy storage devices play key roles in collecting energy from new energy power sources, transferring energy in place and time difference, and supplying energy for those energy consumers. In this work, in order to further improve the high energy density of Li-ion battery, a hard carbon anode is suggested by chosen epoxy as carbon source, accompanied by the simultaneous introduction of three curing agents (dicyandiamide, phytic acid (PA), and ferric acetylacetone). Furthermore, dicyandiamide supplies N-dopant, while PA gives P-dopant and also increases the yield of hard carbon from 23.6 to 40.9%. Based on the synergistic effect of N and P atoms, as well as catalytic effect of Fe, the optimized hard carbon of CNFP-60–700, as Li-ion battery anode, exhibits a reversible capacity of 779.2 mAh g−1 and an initial Coulombic efficiency (ICE) of 58.8% at 0.1 A g−1 for the first cycle, and it still retains a capacity of 508.3 mAh g−1 after 160 cycles.

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The data reported in this manuscript are available from the corresponding author on a reasonable request.

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Acknowledgements

We are grateful for the support of the National Natural Science Foundation of China (22075082), Natural Science Foundation of Shanghai (No. 19ZR1413000, 13ZR1411900), Shanghai Alliance Plan (No. LM201881, LM201751), Shanghai Leading Academic Discipline Project (B502), and Shanghai Key Laboratory Project (08DZ2230500).

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  1. Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China

    Chongjun Zhao, Huiming Guo, Beibei Zhu, Mingkun Li, Xiangzhi Tong, Wenjie Gao, Yunpeng Zhu & Chunhua Zhao

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CZ contributed to conceptualization, investigation, and methodology; HG contributed to writing—original draft and data curation; BZ contributed to conceptualization and data curation; ML, XT, and WG contributed to formal analysis and validation; YZ contributed to methodology; CZ contributed to conceptualization and project administration. All authors were involved in writing and editing the manuscript.

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Zhao, C., Guo, H., Zhu, B. et al. Epoxy resin-derived N, P co-doping hard carbon with improved yield and anode performance in Li-ion battery. Ionics 30, 1971–1981 (2024). https://doi.org/10.1007/s11581-024-05387-7

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