文献类型：期刊文献

英文题名：Double reaction initiated self-assembly process fabricated hard carbon with high power capability for lithium ion capacitor anodes

作者：Zhang, Gaoyue[1,2] Sun, Kang[2,3] Liu, Yanyan[2,4] Wu, Dichao[2] Zhu, Haotian[2] Sun, Yunjuan[2] Wang, Ao[2,3] Jiang, Jianchun[1,2,3]

第一作者：Zhang, Gaoyue

通信作者：Jiang, JC[1];Wang, A[2];Jiang, JC[2];Wang, A[3];Jiang, JC[3]

机构：[1]Southeast Univ, Sch Energy & Environm, Nanjing 210096, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[3]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China;[4]Henan Agr Univ, Coll Sci, Zhengzhou 450002, Henan, Peoples R China

年份：2023

卷号：609

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20224313005740);Scopus(收录号：2-s2.0-85140287536);WOS:【SCI-EXPANDED(收录号:WOS:000881133200003)】；

基金：The authors are grateful to the financial support from National Natural Science Foundation of China (51976234), Key R & D Program (2019YFB1503901), the Natural Science Foundation of Jiangsu Province (BK20191135), the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-202101), and the National Nonprofit Institute Research Grant of Chinese Academy of Forestry (CAFYBB2020ZF001).

语种：英文

外文关键词：Hard carbons; Catalytic graphitization; Hierarchical porous structure; Lithium ion capacitors

摘要：Hard carbons (HCs) are an ideal anode materials for lithium ion capacitors (LICs). However, its power capability is limited by low conductivity and poor ion diffusion kinetics. Optimized graphitic degree, appropriate hierarchical pore structure and efficient heteroatom doping can enhance the rate capability from different dimensions. But it is very difficult to achieve simultaneously through simple synthetic strategies. Herein, an ingenious self-assembly strategy is presented for the preparation of N/P co-doped hierarchical porous graphitic HCs (DGPCs). In the self-assembly process, chitosan was cross-linked with Ni2+ and phytic by chelation and esterification reactions, respectively. Benefiting from the double reaction design, different active sites are separated and thus coupling of multiple modifications is achieved. Optimal sample presents excellent power performance and good cycling stability. Kinetic analysis demonstrates that the Li ion diffusion rate is effectively increased. GDPC-1//AC LIC delivered a high energy density of 50.5 Wh kg(-1) at an ultra-high power density of 20 kW kg(-1). The outstanding power capability is attributed to the synergistic effect between catalytic graphitization, hierarchical porous structure and N/P co-doping, which comprehensively improves the diffusion kinetics of Li+. This work provides a simple and effective strategy for realizing multiple modifications to improve the power capability of hard carbons.