Journal
BATTERIES & SUPERCAPS
Volume 4, Issue 4, Pages 671-679Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.202000316
Keywords
Li-ion capacitor; graphite; solvent-co-intercalation; spent Li-ion battery recycling
Funding
- Women Scientist Scheme-B from the KIRAN division of the Department of Science & Technology (DST), Govt. of India [DST/WOS-B/2018/2039]
- DST through Swarnajayanti Fellowship [DST/SJF/PSA-02/2019-20]
- Science and Engineering Research Board [SB/SJF/2020-21/12]
- National Research Foundation of Korea (NRF) - Korean government (Ministry of Science, ICT & Future Planning) [2019R1A4A2001527]
- National Research Foundation of Korea [2019R1A4A2001527] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The intercalation of Li into graphite is crucial in energy storage mechanisms. Research on co-intercalation has shown potential for effective recycling of spent LIBs.
Li-intercalation into graphite is the key underlying mechanism in the energy storage process. However, the intercalation of solvated Li-ion/co-intercalation of Li-ion into graphite is considered unfitting, as it can initiate exfoliation of graphene layers. But later, it is revealed that co-intercalation of Li does not destroy graphene layers and the compatibility of graphite host; moreover, the type of lithiated solvent molecule decides the reversibility of co-intercalation process. Here, we report the fabrication of glyme-based Li-ion capacitors (LIC). The battery-type electrode, graphite, is recovered from a spent Li-ion battery (LIB) and serves as an anode, active along with a commercial activated carbon cathode. The assembled LIC with a co-intercalation mechanism could deliver a maximum energy density of similar to 46.40 Wh kg(-1) at ambient temperature conditions. In addition, the performance of LIC is studied at various temperature conditions to ensure compatibility at different environmental conditions. The developed dual-carbon LICs with low cost and high performance using recovered graphite as the anode can be considered as a real solution for recycling spent LIBs in an effective way by incorporating the waste-to-wealth approach.
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