Cu_(3)P nanoparticles confined in nitrogen/phosphorus dual-doped porous carbon nanosheets for efficient potassium storage  

作　　者：Yuanxing Yun Baojuan Xi Yu Gu Fang Tian Weihua Chen Jinkui Feng Yitai Qian Shenglin Xiong 

机构地区：[1]Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,Shandong,China [2]Key Laboratory of Material Processing and Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450001,Henan,China [3]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,School of Materials Science and Engineering,Shandong University,Jinan 250061,Shandong,China

出　　处：《Journal of Energy Chemistry》2022年第3期339-347,I0009,共10页能源化学（英文版）

基　　金：the financial supports provided by the National Natural Science Foundation of China(Nos.21971145,21871164);the Taishan Scholar Project Foundation of Shandong Province(No.ts20190908);the Natural Science Foundation of Shandong Province(No.ZR2019MB024);the Young Scholars Program of Shandong University(No.2017WLJH15)。

摘　　要：Immobilizing primary electroactive nanomaterials in porous carbon matrix is an effective approach for boosting the electrochemical performance of potassium-ion batteries (PIBs) because of the synergy among functional components. Herein, an integrated hybrid architecture composed of ultrathin Cu_(3)P nanoparticles (~20 nm) confined in porous carbon nanosheets (Cu_(3)P⊂NPCSs) as a new anode material for PIBs is synthesized through a rational self-designed self-templating strategy. Benefiting from the unique structural advantages including more active heterointerfacial sites, intimate and stable electrical contact, effectively relieved volume change, and rapid K^(+) ion migration, the Cu_(3)P⊂NPCSs indicate excellent potassium-storage performance involving high reversible capacity, exceptional rate capability, and cycling stability. Moreover, the strong adsorption of K^(+) ions and fast potassium-ion reaction kinetics in Cu_(3)P⊂NPCSs is verified by the theoretical calculation investigation. Noted, the intercalation mechanism of Cu_(3)P to store potassium ions is, for the first time, clearly confirmed during the electrochemical process by a series of advanced characterization techniques.

关 键 词：Cu_(3)P Potassium-ion batteries Nitrogen/phosphorus dual-doped porous carbon sheets Intercalation mechanism Heterointerface 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]