High Rate and Long Lifespan Sodium‑Organic Batteries Using Pseudocapacitive Porphyrin Complexes‑Based Cathode  

作　　者：Xi Chen Xin Feng Bo Ren Liangzhu Jiang Hongbo Shu Xiukang Yang Zhi Chen Xiujuan Sun Enhui Liu Ping Gao 

机构地区：[1]Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education,Key Laboratory for Green Organic Synthesis and Application of Hunan Province,College of Chemistry,Xiangtan University,Xiangtan 411105,People’s Republic of China [2]International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education,Institute of Microscale Optoelectronics,College of Chemistry and Enviromental Engineering,Shenzhen University,Shenzhen 518060,People’s Republic of China

出　　处：《Nano-Micro Letters》2021年第5期1-16,共16页纳微快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(21805236);Scientific Research Fund of Hunan Provincial Education Department(18B062);Fundamental Research Fund of Xiangtan University(18QDZ14);Guangdong Basic and Applied Basic Research Foundation(2019A1515110819)。

摘　　要：Sodium-organic batteries utilizing natural abundance of sodium element and renewable active materials gain great attentions for grid-scale applications.However,the development is still limited by lack of suitable organic cathode materials with high electronic conductivity that can be operated stably in liquid electrolyte.Herein,we present 5,15-bis(ethynyl)-10,20-diphenylporphyrin(DEPP)and[5,15-bis(ethynyl)-10,20-diphenylporphinato]copper(II)(CuDEPP)as new cathodes for extremely stable sodium-organic batteries.The copper(II)ion partially contributes the charge storage and significantly stabilizes the structure of porphyrin complex for electrochemical energy storage.In situ electrochemical stabilization of organic cathode with a lower charging current density was identified which enables both improved high energy density and power density.An excellent longterm cycling stability up to 600 cycles and an extremely high power density of 28 kW kg−1 were achieved for porphyrin-based cathode.This observation would open new pathway for developing highly stable sodium-organic cathode for electrochemical energy storage.

关 键 词：Organic cathode Sodium-organic batteries Porphyrin complex Rechargeable batteries Pseudocapacitive effect 

分 类 号：O641.4[理学—物理化学] TM912[理学—化学]