One‐Step Activation of Anode Materials from Spent Lithium‐Ion Batteries as High‐Performance Electrodes for Capacitive Deionization. Issue 2 (23rd December 2020)

• Record Type: Journal Article
• Authors: Weng, Jiaze; Wang, Shiyong; Wang, Gang; Zhang, Peixin; Lu, Bing; Jiang, Jun; Li, Changping
• Is Part Of: ChemElectroChem. Volume 8:Issue 2(2021)
• Page Start: 370
• Page End: 376
• Publication Date: 2020-12-23
• Subjects: mesophase microporous carbon spheres -- recycling -- spent lithium-ion batteries -- anode materials -- capacitive deionization; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202001417
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Mesophase microporous carbon spheres (MMCS), are the anode materials of spent lithium‐ion batteries (LIB), existing in large amounts on the earth that result in resource wastes and ecological pollution. In order to utilize the above waste resources, a new idea of recycling scrapped LIB anode materials was exploited to apply for capacitive deionization (CDI). Herein, the activated microporous carbon spheres (AMCS) were synthesized by a one‐step KOH activation of mesophase microporous carbon spheres (MMCS). By controlling the weight ratios of KOH to MMCS, the fabricated AMCS with the optimal specific surface area of 2626 m 2 g −1 and the pore volume of 0.98 cm 3 g −1 were fabricated. The AMCS3‐1 with a weight ratio of KOH to MMCS of 3 : 1 exhibits higher specific capacitance (196.9 F g −1 ) and lower charge transfer resistance. Importantly, the AMCS3‐1 electrode demonstrates excellent electrosorption capacity of 12.73 mg g −1 and fast salt adsorption rate of 2.64 mg g −1 min −1 at 1.2 V. In addition, the excellent repeatability over 50 regeneration cycles could be obtained for AMCS3‐1 electrode compared with commercial activated carbon electrode. The results reveal that the AMCS3‐1 is a promising candidate as high‐performance electrodes for CDI. The strategy of recycling MMCS from waste LIB anode materials for CDI is desirable, which displays great potential in the removal of sodium chloride (NaCl). Abstract : Recycle and reuse : Capacitive deionization (CDI) is a new type of high‐efficiency electrosorption technology, which exhibits the merits of low energy consumption, low capital consumption, and low environmental pollution. In order to utilize scrapped lithium‐ion battery (LIB) anode materials, a new idea of recycling mesophase microporous carbon spheres (MMCS) is presented and applied to CDI. Herein, the activated microporous carbon spheres (AMCS) are synthesized through the one‐step KOH activation of MMCS.