Copper Porphyrin as a Stable Cathode for High-Performance Rechargeable Potassium Organic Batteries

被引：66

作者：

Lv, Shenshen ^{[1
]}

Yuan, Jingjun ^{[1
]}

Chen, Zhi ^{[2
,4
]}

Gao, Ping ^{[1
]}

Shu, Hongbo ^{[1
]}

Yang, Xiukang ^{[1
]}

Liu, Enhui ^{[1
]}

Tan, Songting ^{[1
]}

Ruben, Mario ^{[2
]}

Zhao-Karger, Zhirong ^{[2
,3
]}

Fichtner, Maximilian ^{[2
,3
]}

机构：

[1] Xiangtan Univ, Coll Chem, Key Lab Environment Friendly Chem & Applicat, Minist Educ,Key Lab Green Organ Synth & Applicat, Xiangtan 411105, Peoples R China

[2] Karlsruhe Inst Technol, Inst Nanotechnol, POB 3640, D-76021 Karlsruhe, Germany

[3] Helmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, Germany

[4] Shenzhen Univ, Inst Microscale Optoelect, Minist Educ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Shenzhen 518060, Peoples R China

来源：

CHEMSUSCHEM | 2020年 / 13卷 / 09期

基金：

中国国家自然科学基金;

关键词：

copper; energy storage; macrocycles; porphyrinoids; potassium; ENERGY-STORAGE; ELECTRODE MATERIALS; ION BATTERIES; CAPACITY; ANODES; DICARBOXYLATES; INTERCALATION; TEREPHTHALATE; GRAPHITE; POLYMERS;

D O I：

10.1002/cssc.202000425

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rechargeable potassium-ion batteries (KIBs) are promising alternatives to lithium-ion batteries for large-scale electrochemical energy-storage applications because of the abundance and low cost of potassium. However, the development of KIBs is hampered by the lack of stable and high-capacity cathode materials. Herein, a functionalized porphyrin complex, [5,15-bis(ethynyl)-10,20-diphenylporphinato]copper(II) (CuDEPP), was proposed as a new cathode for rechargeable potassium batteries. Spectroscopy and molecular simulation studies were used to show that both PF6- and K+ interact with the porphyrin macrocycle to allow a four-electron transfer. In addition, the electrochemical polymerization of the ethynyl functional groups in CuDEPP resulted in the self-stabilization of the cathode, which was highly stable during cycling. This unique charge storage mechanism enabled CuDEPP to provide a capacity of 181 mAh g(-1) with an average potential of 2.8 V (vs. K+/K). These findings could open a pathway towards the design of new stable organic electrodes for KIBs.

引用

页码：2286 / 2294

页数：9

共 63 条

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