期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 35, 期 -, 页码 65-67出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2013.07.040
关键词
Carbon fibres; Lithium intercalation; Electrochemical actuation; Piezoelectric effect; Piezo-electrochemical effect
资金
- Swedish Foundation for Strategic Research (SSF) [RMA08-0002]
- Swedish Research Council [621-2012-3764]
- Swedish Foundation for Strategic Research (SSF) [RMA08-0002] Funding Source: Swedish Foundation for Strategic Research (SSF)
In this paper we have conducted experiments to investigate the coupling between electrochemical and mechanical properties of lithium (Li)-intercalating carbon fibres (CFs). The results show promising potential for new functionalities of CFs for electrochemical actuation, sensing and energy harvesting. Li-intercalation at 1 C-rate in CFs subjected to a constant tensile extension induced a free reversible longitudinal expansion strain of approximately 0.30% which can be used as mechanical actuation. Varying the tensile extension of lithiated CFs resulted in a piezoelectric response of the open-circuit potential, in the range of several mV, enabling strain sensing. If the electrical potential is kept constant during a tensile extension a piezo-electrochemical current response is found with about 50% mechanical to electrical energy conversion efficiency, enabling energy harvesting. (C) 2013 Elsevier B.V. All rights reserved.
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