Hierarchical architecture of Ti3C2@PDA/NiCo2S4 composite electrode as high-performance supercapacitors
Hierarchical architecture of Ti3C2@PDA/NiCo2S4 composite electrode as high-performance supercapacitors
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Ti3C2@PDA/NiCo2S4复合电极作为高性能超级电容器的分层结构
DOI：
10.1016/j.ceramint.2019.05.149
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发表时间：
2019-09
影响因子：
5.2
通讯作者：
Yang Liuqing
中科院分区：
文献类型：
--
作者：
Wu Wenling;Niu Dongjuan;Zhu Jianfeng;Gao Yan;Wei Dan;Zhao Chunhui;Wang Chengwei;Wang Fen;Wang Lei;Yang Liuqing
采用水热法合成了一种新型的Ti3C2@PDA/NiCo 2S 4复合材料，作为高性能超级电容器电极材料。在水热合成NiCo 2S 4过程中，聚多巴胺（PDA）对Ti 3C 2表面进行化学修饰和均匀包覆，可以防止Ti 3C 2的结构坍塌和过氧化。此外，在Ti_3C_2层之间的NiCo_2S_4小颗粒的限制合成，不仅防止了循环过程中相邻单层之间的Ti_3C_2的重新堆积，而且提供了高的表面积可用于电荷转移和离子扩散。从而提高了Ti3C2@PDA/NiCo 2S 4复合材料的电化学循环稳定性。探讨NiCo 2S 4对Ti 3C 2的微观结构、形貌以及超级电容器性能的影响，对于采用合适的水热合成策略调控Ti 3C 2的微观结构和性能具有重要意义。实验结果表明，复合材料的电容性能得到了显著提高，在2 mV s-1时，复合材料的重量比电容高达495 F g-1，比纯Ti 3C 2提高了10倍。此外，Ti3C2@PDA/NiCo 2S 4复合电极的分级结构显著提高了电极的循环稳定性，即使在3000次循环后仍显示出优异的电容保持率（81.16%）。Ti3C2@PDA/NiCo 2S 4电极的超级电容器性能的显著改善归因于令人印象深刻的导电基质Ti 3C 2、小尺寸Ni 2Co 2S 4的有效改性以及Ti3C2@PDA和NiCo 2S 4之间的强界面相互作用。研究表明，硫化钛改性的Ti 3C 2 Mxenes作为高性能超级电容器电极材料具有良好的应用前景。
A novel Ti3C2@PDA/NiCo2S4composites as high performance supercapacitor electrodes were synthesized by the hydrothermal treatment process. The chemical modification and uniformly coating of Ti3C2surface by polydopamine (PDA) can prevent the structural collapse and over-oxidation of Ti3C2during the hydrothermal synthesis of NiCo2S4. Furthermore, the confined-synthesis of smaller NiCo2S4particles between the Ti3C2layers, not only prevent the restacking of Ti3C2that between the adjacent monolayers during cycling, but also afford high surface areas accessible to charge transfer and ion diffusion. Thereby, enhance the electrochemical cycling stability of the Ti3C2@PDA/NiCo2S4composite. It is significant to explore how NiCo2S4alters the microstructure, morphology as well as supercapacitors performance of Ti3C2to tune the microstructure and performance of Ti3C2by appropriate hydrothermal synthesis strategy. The experimental results exhibit a prominent improvement in the supercapacitor performance, the gravimetric capacitance of Ti3C2@PDA/NiCo2S4composites achieve as high as 495 F g-1at 2 mV s-1, which increase the 10 times as compared to the pristine Ti3C2. Furthermore, the cycling stability of the Ti3C2@PDA/NiCo2S4composites electrode was enhanced significantly by the hierarchical architecture, and showed exceptional capacitance retention (81.16%) even after 3000 cycles. The dramatic improvement in the supercapacitors performance of Ti3C2@PDA/NiCo2S4electrodes is attributed to impressive conductive matrix Ti3C2, the effective modification of small size Ni2Co2S4, and the strong interfacial interaction between Ti3C2@PDA and NiCo2S4. This study demonstrating its attractive application prospect of Ti3C2Mxenes modified with bimetallic sulfide as electrode materials for high-performance supercapacitors.
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影响因子：
9.5
作者：
Chongjun Zhao;Qian Wang;Huang Zhang;S. Passerini;Xiuzhen Qian
通讯作者：
Chongjun Zhao;Qian Wang;Huang Zhang;S. Passerini;Xiuzhen Qian
影响因子：
8.4
作者：
Liu, Hui;Duan, Congyue;Zhu, Zhenfeng
通讯作者：
Zhu, Zhenfeng
影响因子：
15
作者：
Tang, Qing;Zhou, Zhen;Shen, Panwen
通讯作者：
Shen, Panwen
影响因子：
9
作者：
Kim, Hong-Ki;Lee, Seung-Hwan
通讯作者：
Lee, Seung-Hwan
影响因子：
13.3
作者：
Xia, Xinhui;Zhu, Changrong;Fan, Hong Jin
通讯作者：
Fan, Hong Jin