O paradoxo do lítio: uma análise crítica da sustentabilidade do ciclo de vida de baterias na transição energética

Iara Ferreira Braga e Fernando Paiva Scardua

Resumo
O presente estudo visa a analisar criticamente se o benefício da descarbonização proporcionado pelas baterias de íon-lítio na transição energética compensa o impacto ambiental causado ao longo de todo o seu ciclo de vida. A urgência da crise climática e a alta emissão do setor de energia impulsionam a eletrificação e o aumento exponencial da demanda por minerais críticos, como o lítio. A abordagem metodológica adotada é a análise qualitativa, ancorada em revisão bibliográfica crítica e análise documental de políticas e evidências de análise do ciclo de vida. Os resultados consolidam o lítio como mineral crítico devido à sua vulnerabilidade geopolítica e a divergência das estratégias globais: a União Europeia foca em regulação e mandatos ambientais, os Estados Unidos priorizam incentivos financeiros e autonomia industrial, e a China adota o controle industrial centralizado via sistema de rastreabilidade. A discussão estabelece um paradoxo de sustentabilidade: a mitigação do gás carbônico na fase de uso é confrontada pela pegada ambiental na fase de produção e no final do ciclo de uso da bateria. Este deslocamento ocorre porque a produção gera uma "dívida de carbono" e agrava indicadores de toxicidade, e a reciclagem não fecha o ciclo eficientemente, com a taxa de recuperação de lítio inferior a 1% devido à ineficiência tecnológica e à baixa atratividade econômica. Conclui-se que o benefício líquido da transição energética só será integralmente alcançado se as políticas de gestão assegurarem, por meio de mandato legal e tecnológico, a descarbonização da matriz energética da produção e a recuperação e reuso de minerais em larga escala, superando as barreiras do descarte.

Palavras-chave
Lítio; Minerais críticos; Transição energética; Economia circular.

Abstract
The lithium paradox: A critical analysis of the sustainability of battery life cycle in the energy transition. The present study aims to critically assess whether the decarbonization benefit provided by lithium-ion batteries in the energy transition outweighs the environmental impact generated throughout their entire life cycle. The urgency of the climate crisis and the high emissions of the energy sector drive electrification and the exponential increase in demand for critical minerals, such as lithium. The methodological approach adopted is qualitative analysis, grounded in a critical literature review and document analysis of policies and life-cycle-assessment evidence. The results consolidate lithium as a critical mineral due to its geopolitical vulnerability and the divergence of global strategies: the European Union focuses on regulation and environmental mandates, the United States prioritizes financial incentives and industrial autonomy, and China adopts centralized industrial control through a traceability system. The discussion establishes a sustainability paradox: the mitigation of carbon dioxide in the use phase is confronted by the environmental footprint in the production phase and at the end of the battery's life cycle. This displacement occurs because production generates a "carbon debt" and worsens toxicity indicators, and recycling does not efficiently close the loop, with lithium recovery rates below 1% due to technological inefficiency and low economic attractiveness. It is concluded that the net benefit of the energy transition will only be fully achieved if management policies ensure, through legal and technological mandates, the decarbonization of the energy mix in production and the large-scale recovery and reuse of minerals, overcoming the barriers of disposal.

Keywords
Lithium; Critical raw materials; Energy transition; Circular economy.

DOI
10.21438/rbgas(2026)133307


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