期刊
ELECTROCHIMICA ACTA
卷 338, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.135897
关键词
Hollow NiMoS4 nanospheres; Energy storage; Supercapacitors; Capacity; Cycle stability
资金
- Fundamental Research Funds for the Central Universities [201813020, 201964009]
- China Postdoctoral Science Foundation [2018M640658, 2019T120611]
- Shandong Provincial Natural Science Foundation, China [ZR2019BB012, 911861230]
- National Natural Science Foundation of China [U1806223, 51572249]
Pseudocapacitor has recently emerged as an important electrical energy storage technology that plays a critical role in portable electronic device, hybrid electric vehicle, backup energy system, and so on. In spite of the great advances, preparing ultra-stable pseudocapacitor with excellent electrochemical performance is still very challenging. Herein, we developed a simple but novel self-template method to synthesize hierarchical hollow NiMoS4 nanospheres with ultrathin shell thickness. During the preparation, nickel-molybdenum oxides coated SiO2 precursors were firstly synthesized. After a sulfidation process with Na2S under hydrothermal condition, the precursors were transformed into hierarchical hollow NiMoS4 nanospheres. Simultaneously, the interior SiO2 was well etched by tuning the initial Ni/S molar ratio. In addition, hollow NiMoS4 nanospheres with different shell thickness were also prepared. Remarkably, the obtained NiMoS4 nanospheres show a very high electrochemical activity due to their fascinating structural and compositional features. The electrode prepared from the NiMoS4 nanospheres delivers a high specific capacity of 1094 C g(-1) current density of 1 A g(-1) with enhanced cycling stability of 97.95% capacitance retention after 10,000 cycles, making them to be potential electrode materials for SCs and other related energy storage devices. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据