期刊
NANO ENERGY
卷 60, 期 -, 页码 385-393出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2019.03.052
关键词
CoSe2; Vertical-oriented graphene; Plasma-enhanced chemical vapor deposition; Sodium-ion capacitor; Electrocatalytic oxygen evolution
类别
资金
- National Natural Science Foundation of China [51702225, 21701118]
- National Key Research and Development Program [2016YFA0200103]
- Jiangsu Youth Science Foundation [BK20170336, BK20160323]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Suzhou, China
- Thousand Youth Talents Plan of China
- Federal Ministry of Education and Research (BMBF)
- Federal Ministry of Economic and Technology (BMWi)
- Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) of Germany within the project KaLiPat [03EK3008]
Transitional metal dichacogenides (TMDs) have stimulated an increasing research and technological attention due to their unique properties, holding great promise for emerging energy storage and conversion applications. However, tailorable and efficient synthesis of TMDs to garner the electrochemical and electrocatalytic performance of thus-derived electrodes has by far remained challenging. Herein we demonstrate a versatile synthetic strategy to in situ grow CoSe2@vertically-oriented graphene (VG) hierarchical architecture on carbon fiber cloth (CC) via combined steps of plasma-enhanced chemical vapor deposition and wet chemistry. Such self-supporting and flexible CoSe2@VG/CC arrays possess significant implications for pseudocapacitive Na storage and electrocatalytic O-2 evolution (OER). When evaluated as an anode material for sodium-ion hybrid capacitors, full cells comprising a CoSe2@VG/CC anode and AC cathode enable a favorable cyclic stability at 0.5 A g(-1) for 1800 cycles in the potential range of 0.5-3.3 V, harvesting a high energy and power density of 116 Wh kg(-1) and 7298 W kg(-1). In addition, CoSe2@VG/CC array also exhibits an excellent OER performance with a low over-potential of 418 mV and Tafel slope of 82 mV dec(-1) on a basis of experimental exploration and theoretical simulation.
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