Molten Salt Self-Template Synthesis Strategy of Oxygen-Rich Porous Carbon Cathodes for Zinc Ion Hybrid Capacitors
Source abstract
Abstract
Porous carbon materials are widely used in capacitive energy storage devices because of their chemical stability, low cost, and controllable textures. Molten salt self-template methods are powerful and sustainable synthesis strategies for preparing porous carbons with tunable pore textures and surface chemistries. Herein, we propose a self-template synthesis strategy for preparing oxygen-rich porous carbons (ORC) by directly carbonizing potassium chloroacetate (ClCH2COOK) as the single carbon source. The potassium chloride salts generated in the carbonization play the roles of the template and etchant agent in the pore formation process. The as-prepared ORC samples feature abundant mesopores (average pore sizes of 1.95–2.19 nm and mesopore ratio of 36.4%), high specific surface areas (1410–1886 m2 g–1), and high oxygen doping levels (4.3–8.2 atom %). The zinc ion hybrid capacitors with an ORC cathode exhibited an ultrahigh capacitance of 308 F g–1 at 0.5 A g–1 and a high energy density of 136.5 Wh kg–1 at a power density of 570 W kg–1. Density functional theory demonstrates that oxygen-containing functional groups are conducive to the adsorption of Zn ions. Our work proposes a general synthesis methodology for the synthesis of oxygen-rich porous carbons for a variety of electrochemical energy storage devices.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemical Engineering and Light Industry, Guangdong University of Technology (GDUT), 100 Waihuan Xi Road, Panyu District, Guangzhou 510006, People’s Republic of China
Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology (GDUT), 100 Waihuan Xi Road, Panyu District, Guangzhou 510006, People’s Republic of China
School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
Materials Science and Engineering, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
Department of Energy and Material Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea
School of Advanced Manufacturing, Guangdong University of Technology (GDUT), Jieyang 522000, People’s Republic of China
Funding
National Natural Science Foundation of China · Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology,
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