1 research outputs found
Purification and Characterization of Reclaimed Electrolytes from Spent Lithium-Ion Batteries
As
an indispensable part of lithium-ion batteries (LIBs), closed-loop
recycling, reusing the electrolyte from spent LIBs, has not yet been
fulfilled experimentally. Herein, this paper presents a LIB electrolyte
recycling approach which consists of supercritical CO<sub>2</sub> extraction,
resin, and molecular sieve purification and components supplements.
The resultant electrolyte exhibited a high ionic conductivity of 0.19
mS·cm<sup>–1</sup> at 20 °C, which was very close
to a commercial electrolyte with the same composition. Moreover, the
electrolyte was also electrochemically stable up to 5.4 V (vs Li/Li<sup>+</sup>) in the linear sweep voltammetry (LSV) measurement. The application
potential of reclaimed electrolyte was demonstrated by Li/LiCoO<sub>2</sub> battery presenting the initial discharge capacity of 115
mAh·g<sup>–1</sup> with a capacity retention of 66% after
100 cycles at 0.2 C. This investigation is a crucial break for electrolyte
recycling and opens a bright route toward realizing closed-loop LIB
recycling