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Title: Effective recycling of manganese oxide cathodes for lithium based batteries

Journal Article · · Green Chemistry
DOI:https://doi.org/10.1039/c6gc00438e· OSTI ID:1336107
 [1];  [2];  [3];  [1];  [1];  [1];  [4];  [4];  [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  2. Stony Brook Univ., NY (United States). Dept. of Chemistry
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate; Tsinghua Univ., Beijing (China). Dept. of Materials Science and Engineering
  4. Stony Brook Univ., NY (United States). Dept. of Chemistry and Dept. of Materials Science and Engineering
  5. Stony Brook Univ., NY (United States). Dept. of Chemistry and Dept. of Materials Science and Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Science Directorate

Rechargeable lithium ion batteries (LIBs) occupy a prominent consumer presence due to their high cell potential and gravimetric energy density, there are also limited opportunities for electrode recycling. Currently used or proposed cathode recycling processes are multistep procedures which involve sequences of mechanical, thermal, and chemical leaching, where only the base material is recovered and significant processing is required to generate a recycled electrode structure. Another significant issue facing lithium based batteries is capacity fade due to structural degradation of the electroactive material upon extending cycling. Herein, inspired by heterogeneous catalyst thermal regeneration strategies, we present a new facile cathode recycling process, where previously used cathodes are removed from a cell, heat treated, and then inserted into a new cell restoring the delivered capacity and cycle life. An environmentally sustainable manganese based material is employed, where binder-free self-supporting (BFSS) electrodes are prepared using a fibrous, high aspect ratio manganese oxide active material. After 200 discharge–charge cycles, the recycled BFSS electrodes display restored crystallinity and oxidation state of the manganese centers with the resulting electrochemistry (capacity and coulombic efficiency) reminiscent of freshly prepared BFSS cathodes. Of note, the BFSS electrode structure is robust with no degradation during the cell disassembly, electrode recovery, washing, and heat treatment steps; thus no post-processing is required for the recycled electrode. Furthermore, this work shows for the first time that a thermal regeneration method previously employed in catalyst systems can fully restore battery electrochemical performance, demonstrating a novel electrode recycling process which could open up new possibilities for energy storage devices with extended electrode lifecycles.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0012673
OSTI ID:
1336107
Report Number(s):
BNL-112551-2016-JA; GRCHFJ
Journal Information:
Green Chemistry, Vol. 18, Issue 11; ISSN 1463-9262
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (3)

High capacity vanadium oxide electrodes: effective recycling through thermal treatment journal January 2019
Silver-Containing α-MnO 2  Nanorods: Electrochemistry in Rechargeable Aqueous Zn-MnO 2 Batteries journal January 2019
Synthesis and Characterization of 2 × 4 Tunnel Structured Manganese Dioxides as Cathodes in Rechargeable Li, Na, and Mg Batteries journal January 2019

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