摘要
Lithium-ion batteries(LIBs)are essential energy storage devices widely used in portable electronics,transportation,and various other applications.However,current anode materials,with their low intercalation potentials and poor rate performance,struggle to balance energy density,power density,and safety,particularly under extreme conditions.In this work,we report a self-regulating micro-channel network that forms a three-dimensional(3D)composite electrode architecture without binders and conductive additives,offering a promising anode solution for fast-charging LIBs.Benefiting from the robust 3D architecture with abundant Li^(+)active sites and superior electronic conductivity,the niobium tungsten oxide@carbon nanotube(NWO/CNT)composite electrode demonstrates a high reversible capacity(246.6mAh/g at 0.2 C),excellent rate capability(117.1 mAh/g at 60 C),and long-term durability(73.0%capacity retention after 10,000 cycles).Additionally,a thick electrode with high mass loading(10 mg/cm^(2))shows remarkable high-rate performance,retaining 51.7%capacity at 20 C.Notably,when paired with LiFePO_(4)(LFP)cathodes,the NWO@CNT//LFP@CNT full batteries exhibit impressive high-power capability(2.8 kW/kg),high energy density(394.2 Wh/kg),and exceptional cycle stability(82%capacity retention after 6000 cycles).Most importantly,this composite electrode architecture also enables the fabrication of a planar,miniaturized,all-solid-state lithium-ion battery with fast-charging capabilities.
基金
supported by the National Key R&D Program of China(No.2022YFB2402600)
One-Three-Five Strategic Planning of Chinese Academy of Sciences(CAS)
the Zhaoqing Municipal Science and Technology Bureau(No.2019K038)
provided by Singapore Ministry of Education Academic Research Grant Tier 2(No.MOE-T2EP50121-0007)。
