Journal
CARBON
Volume 174, Issue -, Pages 1-9Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.12.018
Keywords
Thick electrode; All-carbon framework; High-areal-capacity; Pseudocapacitive kinetics; DFT calculation
Funding
- Natural Science Foundation of China [21875292]
- Science Starting Foundation of Hunan University [531118010182]
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This study utilized the concept of thick electrode to design a high-capacity lithium-ion battery anode with a 3D all-carbon framework. By incorporating GNP, the electrode achieved easier Li-ion intercalation/deintercalation pathway, promoting pseudocapacitive and surface adsorption Li-ion storage.
Here, the concept of thick electrode is utilized to design a-17 mm three-dimensional (3D) all-carbon frameworks with remarkable structural stability as high-areal-capacity anode for lithium-ion batteries (LIBs). The framework involves the rational design of graphite fibers (GFs) bonded with pyrolytic carbon (PC) and graphite nanoplatelets (GNP), offering a unique architecture and a scalable production approach. The as-fabricated 3D-GF/ PC/GNP electrode with a high mass loading of z30 mg cm(-2) can deliver an unexpected high initial and reversible areal capacity of 23.53 and 11.63 mA h cm(-2) at current density of 2.0 mA cm(-2), impressive rate performance and cyclic stability. Both theoretical simulations and experimental analyses show that the excellent performance of the electrode can be attributed to the incorporation of GNP that modulates the electronic conductivity of the framework, enabling easier Li-ion intercalation/deintercalation pathway to promote the pseudocapacitive and surface adsorption Li-ion storage. (C) 2020 Elsevier Ltd. All rights reserved.
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