Lithium integration with renewables for a sustainable energy transition: opportunities, challenges, and environmental impacts

The transition toward net-zero energy systems is rapidly elevating lithium from a battery material to a strategic infrastructure component linking renewable electricity, energy storage, and emerging hydrogen pathways. Despite extensive literature on lithium technologies and sustainability, existing studies often examine technological performance, environmental impacts, or policy dynamics in isolation, limiting systems-level understanding of lithium's role in long-term decarbonization. This review introduces a unified analytical framework based on three structural tensions – technological scalability, environmental trade-offs, and policy coordination – to evaluate how expanding lithium deployment both enables and constrains sustainable energy transitions. Drawing on integrated insights from energy-system modeling, life-cycle assessment, and policy analysis, the study synthesizes global demand trajectories, renewable integration pathways, environmental intensities, and geopolitical supply-chain risks. The analysis highlights lithium's central function in stabilizing solar and wind generation, supporting hydrogen production, and reshaping critical-minerals geopolitics, while also exposing upstream ecological pressures and processing bottlenecks that challenge sustainability goals. Building on these findings, a multi-timescale strategic framework is proposed, outlining immediate, medium-term, and long-term actions for responsible extraction, supply diversification, and circular-economy deployment. Ultimately, lithium emerges as both an enabler and a systemic constraint within the clean-energy transition, underscoring the need for coordinated technological innovation and governance strategies to ensure that decarbonization reduces environmental burdens rather than transferring dependency from fossil fuels to critical minerals.