期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 701, 期 -, 页码 67-74出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.01.123
关键词
Liquid-phase exfoliation; NH4Co0.4Ni0.6PO4 center dot H2O nanosheets; Ultra-long cycling life; Energy storage
资金
- fundamental research funds for the Central Universities [106112015CDJZR305501]
- Defense Key Disciplines Lab of Novel Micro-nano Devices and System Technology Foundation
- synergistic Innovative Joint Foundation of CAEP-SCU [XTCX2014007]
- Graduate Scientific Research and innovation foundation of Chongqing, China [CYS16036]
Liquid-phase exfoliation is an effective method to fabricate thin nanosheet materials with layered structure. In this paper, we successfully synthesized NH4Co0.4Ni0.6PO4 center dot H2O nanosheets with the thickness of about tens of nanometers through liquid-phase exfoliation under ultrasonication. Specifically, the formamide solution was chosen as the exfoliation solvent due to it is capable of entering the interlayer of bulk materials and rapidly swelling between layers. Electrochemistry tests revealed that the optimized exfoliation time was 4 days. The asymmetric battery type energy storage device AC//NH4Co0.4Ni0.6PO4 center dot H2O nanosheets showed an energy density of 10.8 Wh kg(-1) at the power density of 703.1 W kg(-1). More importantly, the long-term cycle stability measurements demonstrated that NH4Co0.4 Ni0.6PO4 center dot H2O nanosheets after exfoliation had an ultra-long cycling life that still retained 102.3% of specific capacitance even 10000 continuous charge/discharge cycles. (C) 2017 Elsevier B.V. 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