Low electronic conductivity and drastic volume change during cycling of transition metal oxides, as anodes for lithium ion batteries (LIBs), lead to rapid capacity decay and poor structural stability. Herein, nanostructured NiCo₂O₄ anchored on carbon sheets was synthesized by a facile hydrothermal method with following thermal treatment. The wrinkled carbon substrate in the composite derives from the carbonization of pomelo peels, which can be mass-produced for the large-scale application. This composite shows mesoporous structures with high specific surface areas and intimate NiCo₂O₄/carbon interfaces, which favors the alleviation of the volume expansion/shrink during charging/discharging process and improves the electron/mass transport, enhancing the capability and stability for LIBs. This composite delivers a high reversible capacity of 473.7 mA h g⁻¹ after 210 cycles at a current density of 500 mA g⁻¹. A long cycle life of up to 1100 cycles at 2000 mA g⁻¹ is achieved with the retention capacity of 363 mA h g⁻¹. The electrode also exhibits excellent rate capability and can regain its original capacities as reversing to the low current densities. This work highlights the biomass-derived carbon-supported metal oxides as an environmentally friendly and economic strategy for advanced LIBs.

作为锂离子电池（LIB）的阳极，过渡金属氧化物循环期间的低电子电导率和急剧的体积变化会导致容量快速下降和结构稳定性差。在此，通过简便的水热法并随后进行热处理，合成了锚固在碳片上的纳米结构的NiCo ₂ O ₄。复合材料中起皱的碳基材源自柚皮的碳化，可以大规模生产以进行大规模应用。该复合材料显示出具有高比表面积和紧密NiCo ₂ O _4的介孔结构碳/碳界面，有利于减轻充电/放电过程中的体积膨胀/收缩，并改善电子/质量传输，增强锂离子电池的能力和稳定性。该复合材料在210次循环后以500 mA g ^-1的电流密度提供473.7 mA h g ^-1的高可逆容量。在363 mA h g ^-1的保持能力下，在2000 mA g ^-1时可实现高达1100个循环的长循环寿命。该电极还具有出色的倍率能力，并可以恢复为低电流密度时恢复其原始容量。这项工作强调了生物质衍生的碳载金属氧化物作为高级LIB的环保和经济策略。