Activity engineering of cobalt-based oxide materials for high performance supercapacitors: from morphology regulation to structural optimization

Abstract

Supercapacitors (SCs) have been considered as promising energy storge devices owing to high-power density, short charge-discharge time and long cycle life. Benefiting from high specific capacitance, cobalt-based oxides, as an...

Morphological control and performance engineering of Co-based materials for supercapacitors

“…At present, the most advanced electrochemical energy-storage technology can be classified into two major categories: lithiumion batteries and supercapacitors. [7][8][9][10] Compared with lithiumion batteries, supercapacitors exhibit many advantages such as higher power density, faster charge-discharge speed and longer cycle-life, [11][12][13][14] as illustrated in Fig. 1.…”

Synergistic Interfacial Engineering of Heterostructured Cobalt Phosphide Spheres/Cobalt Hydroxide Nanosheets for Overall Water Splitting

“…Benefiting from the low cost and environmental friendliness, electrochemical water splitting has been identified as a sustainable way to obtain hydrogen . However, due to the sluggish kinetics of hydrogen evolution (HER) and oxygen evolution (OER) reactions, electrochemical water splitting generally requires efficient electrocatalysts to accelerate the reaction rate of water electrolysis . Although noble-metal electrocatalysts (e.g., IrO 2 /RuO 2 and Pt/C) exhibit favorable electrocatalytic performance toward water splitting, their rareness and high price severely limit their further commercialization. , Therefore, it is urgent to develop cost-effective and high-efficiency non-precious-metal bifunctional electrocatalysts for catalyzing the HER and OER, including phosphides, sulfides, carbides, and oxides …”

All-redox hybrid supercapacitors based on carbon modified stacked zinc cobaltite nanosheets

“…During the redox process, the Co ions deliver high capacitance and the Zn ions facilitate more efficient electron transport. [24][25][26] However, the supercapacitive performance of ZnCo 2 O 4 is affected by insufficient active specic surface area and an unstable structure during long charge-discharge operation. The performance of ZnCo 2 O 4 can be improved by compositing it with highly conductive materials such as carbonaceous materials or conducting polymers.…”