Yang Jingjiang, Li Huiling, He Shuijian, Du Haijuan, Liu Kunming, Zhang Chunmei, Jiang Shaohua
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
College of Textiles, Zhongyuan University of Technology, Zhengzhou 450007, China.
Polymers (Basel). 2022 Jun 21;14(13):2521. doi: 10.3390/polym14132521.
Multichannel-porous carbon derived from wood can serve as a conductive substrate for fast charge transfer and ion diffusion, supporting the high-theory capacitance of pseudocapacitive materials. Herein, NiCoO nanosheets, which are hierarchically porous, anchored on the surface of carbonized wood via electrodeposition for free-binder high-performance supercapacitor electrode materials, were proposed. Benefiting from the effectively alleviated NiCoO nanosheets accumulation and sufficient active surface area for redox reaction, a N-doped wood-derived porous carbon-NiCoO nanosheet hybrid material (NCNS-NCW) electrode exhibited a specific electric capacity of 1730 F g at 1 A g in 1 mol L KOH and splendid electrochemical firmness with 80% capacitance retention after cycles. Furthermore, an all-wood-based asymmetric supercapacitor based on NCNS-NCW//NCW was assembled and a high energy density of 56.1 Wh kg at a watt density of 349 W kg was achieved. Due to the great electrochemical performance of NCNS-NCW, we expect it to be used as an electrode material with great promise for energy storage equipment.
源自木材的多通道多孔碳可作为快速电荷转移和离子扩散的导电基底，支持赝电容材料的高理论电容。在此，提出了通过电沉积将具有分级多孔结构的NiCoO纳米片锚定在碳化木材表面，用于制备无粘结剂高性能超级电容器电极材料。受益于有效缓解的NiCoO纳米片堆积以及用于氧化还原反应的足够活性表面积，一种N掺杂的木材衍生多孔碳-NiCoO纳米片混合材料（NCNS-NCW）电极在1 mol/L KOH中1 A/g电流密度下表现出1730 F/g的比电容，并具有出色的电化学稳定性，循环后电容保持率为80%。此外，基于NCNS-NCW//NCW组装了全木质不对称超级电容器，在349 W/kg的功率密度下实现了56.1 Wh/kg的高能量密度。由于NCNS-NCW具有优异的电化学性能，我们期望它作为一种极具潜力的电极材料用于储能设备。
