A Review of Compact Carbon Design for Supercapacitors with High Volumetric Performance. Issue 48 (8th March 2021)

• Record Type: Journal Article
• Authors: Li, Pei; Shang, Tongxin; Dong, Ximan; Li, Huan; Tao, Ying; Yang, Quan‐Hong
• Is Part Of: Small. Volume 17:Issue 48(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-08
• Subjects: compact carbon -- electrodes -- supercapacitors -- volumetric performance; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202007548
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Volumetric performance is of great importance in today's energy storage devices, and is used to evaluate their competitiveness in the markets of miniaturized electronic devices and space‐constrained electric vehicles. Supercapacitors suffer from a low volumetric energy density in spite of their high power and long cycle life because of their use of porous but low‐density carbons. This review considers compact carbon design strategies for high volumetric performance supercapacitors based on four key electrode parameters: density, thickness, gravimetric capacitance, and nonactive components. A guide is provided for constructing a conductive additive‐/binder‐free self‐supported ultrathick, dense electrode to maximize the volumetric energy density. The research status of emerging micro‐supercapacitors and hybrid supercapacitors is then briefly discussed, emphasizing the importance of their volumetric performance and the opportunities as well as challenges they face in the trendy Internet of things applications or larger device systems. Abstract : Compact carbon design for high volumetric performance supercapacitors is crucial to meet the requirements of next‐generation electronic devices. From an electrode perspective, an in‐depth summary of various strategies is made to regulate four key factors influencing the volumetric performance, namely, electrode density, electrode thickness, gravimetric capacitance, and content of nonactive components, by reviewing the most advanced progress in recent years.