skip to main content

DOE PAGESDOE PAGES

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

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, electrodemore » 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.« less
Authors:
 [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
Publication Date:
Report Number(s):
BNL-112551-2016-JA
Journal ID: ISSN 1463-9262; GRCHFJ
Grant/Contract Number:
SC00112704; SC0012673
Type:
Accepted Manuscript
Journal Name:
Green Chemistry
Additional Journal Information:
Journal Volume: 18; Journal Issue: 11; Journal ID: ISSN 1463-9262
Publisher:
Royal Society of Chemistry
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; lithium; ion; batteries; LIBs; energy; storage; cycle
OSTI Identifier:
1336107