| Title | The recovery of expired ferrous gluconate and spent Li foils into high performance straw-bundle-like α-LiFeO2/C cathode |
|---|---|
| ID_Doc | 27154 |
| Authors | Lan, J; Hou, HY; Meng, K; Feng, MM; Li, JK |
| Title | The recovery of expired ferrous gluconate and spent Li foils into high performance straw-bundle-like α-LiFeO2/C cathode |
| Year | 2021 |
| Published | |
| Abstract | The successful conversion of the wastes into a valuable electrode material is an efficient sustainable strategy to develop the circular economy mode. For this purpose, two kinds of wastes (expired ferrous gluconate and spent Li foils) were synchronously recycled by the solvothermal reaction and the subsequent calcination in N-2 atmosphere at the different temperatures of 500 degrees C and 600 degrees C, and the resultant alpha-LiFeO2/C composite were named as 500-LFO/C and 600-LFO/C. Furthermore, the effect of the calcination temperature on the microstructure, morphology and the electrochemical Li-storage performances of alpha-LiFeO2/C composite was also investigated. The results showed that both 500-LFO/C and 600-LFO/C manifested the uniform hierarchical straw-bundle-like morphologies, indicating that the morphology mainly formed during the solvothermal reaction other than the calcinations; 600-LFO/C possessed higher crystallinity and graphitization degree than 500-LFO/C due to higher calcination temperature. As a result, the reversible specific discharge capacity of 600-LFO/C cathode reached 135.5 mAh.g(-1) after 100 cycles at 1.0 C, higher than 118.2 mAh.g(-1) of 500-LFO/C cathode. Additionally, the underlying reaction mechanisms of the morphology formation and Li-storage were also disclosed. No doubt, such an exploration would facilitate to reduce the environmental pollution and promote the circular economy of the waste resources. (C) 2021 Elsevier Ltd. All rights reserved. |
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