期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 44, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201805618
关键词
acidic aqueous electrolytes; durability; supercapacitors; titanium niobium oxide; ultrahigh voltage
类别
资金
- National Key R&D Program of China [2016YFA0202604]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306048]
- National Natural Science Foundation of China [31530009, 21403306, 21461162003, 21773315]
- Tip-top Scientic and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C205]
- Pearl River Nova Program of Guangzhou [201610010080]
- Technology Planning Project of Guangdong Province [2015B090927007]
- Fundamental Research Funds for the Central Universities [17lgzd16, 17lgjc36]
Despite appealing supercapacitive properties, the acidic aqueous supercapacitors (SCs) are still suffering from low operating voltage (<1 V) leading to unsatisfactory energy densities. Herein, for the first time, it is reported that the oxygen defect modulated Ti2Nb10O29-x (TNOx) on interlinked graphene array (denoted as TNO(x)G) can achieve a wide potential window up to 1.8 V in 1 m H2SO4 electrolyte and deliver an extremely high capacitance up to 368.9 F g(-1) at 0.5 A g(-1). Accompanying the improved charge transfer efficiency and preferable H ion diffusion, the oxygen defects in TNO(x)G are capable of stimulating more pseudocapacitive behavior and simultaneously suppressing oxygen evolution reaction. Furthermore, a 1.4 V high voltage quasi-solid-state TNO(x)G-based symmetric supercapacitor is demonstrated, yielding a maximum energy density of 0.58 mWh cm(-3) at a power density of 0.57 W cm(-3) and exceptionally excellent cycling durability. It is believed that this strategy of oxygen defect modulation to optimize reaction kinetics will lead to further improvements in the performance of high-voltage aqueous SCs.
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