Waste lithium-ion batteries can make low-cost carbon dioxide adsorbents

Recently, qin Changlei’s team at the School of Energy and Power Engineering of Chongqing University proposed the use of waste lithium-ion batteries (LIB) to synthesize low-cost lithium silicate (Li4SiO4) materials as carbon dioxide (CO2) absorbers, and verified the technical feasibility. The results were published in Environmental Science and Technology on April 18.

The research team pointed out that the huge consumption of fossil fuels has led to excessive emissions of carbon dioxide, and reducing their emissions has become an urgent worldwide problem. Renewable energy and battery energy storage, carbon capture and utilization, and storage are recognized as the two main pathways to carbon neutrality. However, due to the limited life of lithium-ion batteries (LIBs), facing the problem of scrapping a large number of lithium-ion batteries, the current cost of obtaining effective CO2 capture materials to achieve carbon neutrality is still very high.

In this study, the research team synthesized lithium silicate materials using waste lithium-ion batteries. The results show that the lithium silicate material synthesized by this method has excellent carbon dioxide capacity and cycle stability, so it has good adsorption to carbon dioxide. In addition, the cost of preparing an adsorbent from a used lithium-ion battery is only 1/20–1/3 of that of conventional methods.

Waste lithium batteries make carbon dioxide adsorbents. Image from the paper

The scientific research team said that this work can not only promote the recovery of waste lithium-ion batteries, but also greatly reduce the cost of preparing lithium silicate adsorbents, so it is of great significance for the development of carbon dioxide adsorption. (Source: China Science Daily Zheng Jinwu)

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