Sulfonic-Group-Grafted Ti3C2Tx MXene: A Silver Bullet to Settle the Instability of Polyaniline toward High-Performance Zn-Ion Batteries

被引:126
作者
Liu, Ying [1 ,2 ]
Dai, Ziwen [1 ,2 ]
Zhang, Wang [1 ,3 ]
Jiang, Yue [1 ]
Peng, Jian [3 ]
Wu, Dianlun [1 ]
Chen, Bin [1 ]
Wei, Wei [4 ]
Chen, Xian [1 ]
Liu, Zhenjie [1 ,2 ]
Wang, Zhigang [7 ]
Han, Fei [1 ]
Ding, Dahu [5 ]
Wang, Lei [1 ]
Li, Lina [6 ]
Yang, Yingguo [6 ]
Huang, Yang [1 ]
机构
[1] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China
[2] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China
[3] Univ Wollongong, Inst Superconducting & Elect Mat, Innovat Campus, Wollongong, NSW 2522, Australia
[4] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China
[5] Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
[6] Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China
[7] Shenzhen Univ, Hlth Sci Ctr, Sch Pharmaceut Sci, Shenzhen 518055, Peoples R China
基金
中国国家自然科学基金;
关键词
Zn-ion battery; Ti3C2Tx MXene; surface engineering; grafting ability; PANI; HIGH-CAPACITY; SUPERCAPACITOR; CONDUCTIVITY; NANOSHEETS; CHEMISTRY; ELECTRODE; CATHODE; HYBRID; ENERGY;
D O I
10.1021/acsnano.1c02215
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Polyaniline (PANI) is a promising cathode material for Zn-ion batteries (ZIBs) due to its intrinsic conductivity and redox activity; however, the achievements of PANI in high-performance ZIBs are largely hindered by its instability during the repeated charge/discharge. Taking advantage of the high conductivity, flexibility, and grafting ability together, a surface-engineered Ti3C2Tx MXene is designed as a silver bullet to fight against the deprotonation and swelling/shrinking issues occurring in the redox process of PANI, which are the origins of its instability. Specifically, the sulfonic-group-grafted Ti3C2Tx (S-Ti3C2Tx) continuously provides protons to improve the protonation degree of PANI and maintains the polymer backbone at a locally low pH, which effectively inhibits deprotonation and brings high redox activity along with good reversibility. Meanwhile, the conductive and flexible natures of S-Ti(3)C(2)T(x )assist the fast redox reaction of PANI and concurrently buffer its corresponding swelling/shrinking. Therefore, the S-Ti3C2Tx-enhanced PANI cathode simultaneously achieves a high discharge capacity of 262 mAh g(-1) at 03 A g(-1), a superior rate capability of 160 mAh g(-1) at 15 A g(-1), and a good cyclability over 5000 cycles with 100% coulombic efficiency. This work enlightens the development of versatile MXene via surface engineering for advanced batteries.
引用
收藏
页码:9065 / 9075
页数:11
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