Electric Double Layer Capacitance of Highly Porous Carbon Derived from Lithium Metal and Polytetrafluoroethylene
- 1 January 2001
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 4 (1), A5-A8
- https://doi.org/10.1149/1.1344276
Abstract
Highly porous carbon material was prepared from defluorination of polytetrafluoroethylene (PTFE) with lithium metal, and its electric double layer capacitance was measured in 1.0 M aqueous electrolyte. The solid-solid reaction product of PTFE film with Li foil had micro/nano domain structure consisting of a one-dimensional carbon chain (carbynelike structure) and LiF. After cross-linking of the carbon chain and condensation of LiF in the reaction product, highly porous carbon containing micropore and meso/macropore was obtained by removal of fine LiF particles with dilute HCl solution. This porous carbon derived from PTFE and Li (PCPTFE) showed higher capacitance (Brunauer-Emmett-Teller, BET, surface area 1045 m2 g-1, capacitance 199 F g-1) than activated carbon fiber with almost the same BET surface area (1084 m2 g-1, 134 F g-1). The higher capacitance of PCPTFE can be related to the surface conditions, the matrix carbon structure, and, especially, the pore structure of PCPTFE. © 2000 The Electrochemical Society. All rights reserved.Keywords
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