An Aqueous Battery–Pseudocapacitor Hybrid Capacitor Based on Conductive Core–Shell NiCoSe2@Co9Se8 Hollow Nanospheres Hybridized with Nanoscale Ru0.41In0.59Oy. Issue 3 (13th December 2019)

• Record Type: Journal Article
• Authors: Hou, Linrui; Sun, Xuan; Guo, Linzhi; Meng, Xiaotang; Wei, Jinxuan; Yuan, Changzhou
• Is Part Of: Energy technology. Volume 8:Issue 3(2020:Mar.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-12-13
• Subjects: aqueous hybrid capacitors -- battery–pseudocapacitor devices -- high energy density -- NiCoSe2@Co9Se8 -- Ru0.41In0.59Oy; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201901319
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : It is always a huge challenge to explore advanced aqueous supercapacitors with both high energy and high power densities. Herein, conductive NiCoSe2 @Co9 Se8 hollow nanospheres (HNSs) are solvothermally synthesized, where the Co9 Se8 nanosheets uniformly surround hollow NiCoSe2 core. The resultant NiCoSe2 @Co9 Se8 HNSs are further exploited as a positive electrode for designing a aqueous battery–pseudocapacitor hybrid device by combining it with the high ionic/electronic conductive Ru0.41 In0.59 O y nanoparticles as the negative electrode. Due to synergetic contributions from the two involved electrodes, the assembled Ru0.41 In0.59 O y //NiCoSe2 @Co9 Se8 hybrid capacitor is endowed with a wide‐voltage window from 0.0 to 1.5 V, and exhibits a large specific capacitance of ≈206 F g −1 at 0.5 A g −1 and excellent cyclic durability with ≈10% capacitance decay after 5000 consecutive cycles, together with a high energy density of ≈50 Wh kg −1 at a specific power of 3750 W kg −1 . Abstract : The assembled Ru0.41 In0.59 O y //NiCoSe2 @Co9 Se8 aqueous hybrid device with a wide operating voltage window of 0.0–1.5 V exhibits exceptional electrochemical properties due to synergetic contributions from the two involved electrodes.