关键矿产供应链瓶对电动汽车部署的气候影响
Lucas Woodley1, Chung Yi See2, Peter Cook3
1Faculty of Arts and Sciences, Harvard University, Cambridge, MA, USA.
Nature communications
|August 9, 2024
概括
美国新的排放标准可能会促进电动汽车 (EV) 销售,但关键矿物供应链的限制可能会限制生产和相关的气候效益,特别是石墨和.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 能源政策 能源政策
背景情况:
- 新的尾气排放标准正在推动美国增加电动汽车 (EV) 的采用.
- 关键矿物供应链对于电动汽车电池生产至关重要,并面临潜在的限制.
研究的目的:
- 根据新的排放标准,分析EV生产的关键矿物供应链约束.
- 量化这些供应链限制对气候的影响.
- 探索实现减排目标的其他途径.
主要方法:
- 分析矿产储备数据,包括经济上可行的和地质上可用的储备.
- 基于矿产可用性的电动汽车制造能力的建模.
- 生命周期温室气体排放量的量化,包括二氧化碳相当量 (CO2e).
- 评估美国和盟国当前和预计的矿产生产能力.
主要成果:
- 拟议的标准要求在2027-2032年期间,将超过1021万辆内燃机汽车替换为电动汽车.
- 对于合理的电动汽车制造,存在足够的矿产储量,可减少高达4573万的二氧化碳.
- 目前的矿产生产能力仅支持509万辆电动汽车,低于合规目标.
- 这种缺口导致至少59.54亿CO2e的生命周期排放损失.
- 电池级石墨和的有限生产被确定为重大限制.
结论:
- 虽然基于储备,电动汽车制造是合理的,但目前的生产能力限制了实现排放标准.
- 石墨和等关键矿物的供应链限制对电动汽车部署和气候目标构成重大风险.
- 如果矿物供应限制持续存在,需要采取替代策略来实现减排目标.
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