4.8 Article

Tube-like carbon for Li-ion capacitors derived from the environmentally undesirable plant: Prosopis juliflora

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CARBON
卷 98, 期 -, 页码 58-66

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.10.087

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  1. International Collaborative Energy Technology R&D Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
  2. Ministry of Trade, Industry & Energy, Republic of Korea [20128510010050]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [20128510010050] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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This work describes the fabrication of high-energy Li-ion hybrid electrochemical capacitors (Li-HEC) from the environmentally threatening and invasive Prosopis juliflora. The carbon derived from this acts as the positive electrode active material in organic medium. High-surface-area carbon was obtained from P. juliflora and activated using KOH at various concentrations and temperatures. Of the tested ratios, 1:2 (carbon:KOH) treated at 900 degrees C (KC21-900) yielded a high specific surface area (2410 m(2) g(-1)) and specific capacitance (similar to 161 F g(-1)). Then, a Li-HEC was fabricated with a homemade insertion-type Li4Ti5O12 negative electrode, delivering a maximum energy density of similar to 80 W h kg(-1). In addition, the prepared Li-HEC had excellent cycleability (10000 cycles) and good capacity retention characteristics. (C) 2015 Elsevier Ltd. All rights reserved.

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