超级电容器
电容
锌
水溶液
异质结
材料科学
电极
基质(水族馆)
功率密度
三元运算
储能
化学工程
纳米技术
光电子学
化学
冶金
物理化学
海洋学
物理
地质学
工程类
功率(物理)
程序设计语言
计算机科学
量子力学
作者
Weiwei Zhang,Haoli Jiang,Yahui Li,Wenjie Ma,Xiaoyan Yang,Jianfeng Zhang
标识
DOI:10.1016/j.jallcom.2021.160881
摘要
• A new pizza-like ternary heterostructure Ti 3 C 2 T x /Bi 2 S 3 @N-C was fabricated by in-situ growth. • The introduction of dopamine has played an important role in the construction of the ternary composite material. • Ti 3 C 2 T x /Bi 2 S 3 @N-C delivered high specific capacitance of 653 F g -1 at 1 A g -1 in three electrode system. • Ti 3 C 2 T x /Bi 2 S 3 @N-C served as electrode material both for SSC and ZIHC and showed energy density of 46.98 W h kg -1 in ZIHC. The aqueous zinc-ion hybrid supercapacitor (ZIHC) has become an emerging energy storage device due to its safety and low cost. Herein, a new pizza-like heterostructure of Ti 3 C 2 T x intercalated by N-doped-carbon-wrapped Bi 2 S 3 is fabricated by in-situ growth. The specific capacitance of Ti 3 C 2 T x /Bi 2 S 3 @N-C electrode is as high as 653 F g −1 at 1 A g −1 , which is significantly higher than other binary composites or similar MXene-based materials in literature. The ZIHC are assembled with Ti 3 C 2 T x /Bi 2 S 3 @N-C and Zn foil as electrodes, possessing high specific capacitance of 150.33 F g −1 at 1 A g −1 , and a maximum energy density of 46.98 W h kg −1 at a power density of 750 W kg −1 . The excellent performance of Ti 3 C 2 T x /Bi 2 S 3 @N-C is mainly attributed to the synergistic effect of the three components: (a) highly conductive Ti 3 C 2 T x as the substrate shortens the electron transport path; (b) the in-situ growth of Bi 2 S 3 on Ti 3 C 2 T x layers makes full use of Bi 2 S 3 active sites; (c) the innovative introduction of dopamine can not only make Bi(NO) 3 evenly dispersed, but also form the “cross-bridge” N-C film, which further improves the binding between Ti 3 C 2 T x substrate and Bi 2 S 3 and reduces the internal resistance greatly. This study proposes a new in-situ growth strategy for a ternary heterostructure, which may offer a new avenue for the development of high-performance electrode materials.
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