Towards a sustainable future: CityUHK scholar reveals significant environmental benefits of lithium-ion battery recycling
As global demand for electric vehicles (EVs) and renewable energy surges, establishing sustainable practices in lithium-ion battery (LIB) production, recycling and disposal has become critical. A collaborative study co-led by Professor Xi Chen, Assistant Professor in the School of Energy and Environment at City University of Hong Kong (CityUHK), offers a promising roadmap for this transition.
The paper, titled “Life cycle comparison of industrial-scale lithium-ion battery recycling and mining supply chains”, was published in Nature Communications.
The study, which focused on the industrial-scale production of battery-grade materials from end-of-life LIBs, found that recycling these batteries can cut environmental impacts by a remarkable 58%, utilising a process that is significantly less harmful to the environment than conventional raw material extraction methods.
One of the most critical findings of this research is the importance of refining practices. The study found that recycling non-energised battery scrap can reduce energy consumption by a staggering 88.7%, while energy requirements for recycled battery streams are 77.1% lower than traditional mining processes.
Additionally, the research indicates that switching from creating discrete salt products to mixed metal products in the recycling process can lead to even lower environmental impacts while still meeting the high global demand for LIB supply chains.
In contrast to traditional refining processes, the main environmental impact of recycling LIBs is electricity consumption, which accounts for up to 91% of the energy used. However, by utilising alternative energy sources such as nuclear, wind and solar energy, greenhouse gas emissions and water consumption can be greatly reduced, thereby enhancing sustainable practices.
By presenting a viable alternative to resource-intensive mining, Professor Chen advocates for sustainable recycling practices in the LIB industry, which could aid in the fight against climate change and conserve natural resources. “Recycling offers a clear pathway towards achieving sustainability goals while ensuring a resilient and consistent supply of high-demand materials,” he said.
Following his research findings, Professor Chen was interviewed by Time magazine, where he shared his perspectives on the future of LIB recycling. He emphasised the importance of scaling up recycling capacity and improving process efficiency to meet global sustainability goals.
At the forefront of promoting sustainability research, CityUHK is supporting innovative research in battery technology and green energy, paving the way for a future in which energy transitions can occur alongside sustainable practices.