新能源车续航里程有望翻倍

Core Insights - A research team led by Huang Xuejie from the Chinese Academy of Sciences has successfully addressed the challenge of achieving tight contact between solid electrolytes and lithium electrodes in all-solid-state lithium batteries, marking a significant advancement in next-generation battery technology [1][3][6] Group 1: Breakthrough Technology - The new technology allows all-solid-state lithium batteries to operate effectively under low or no external pressure, overcoming the traditional reliance on heavy mechanical systems that apply over 5 MPa of pressure [2][3] - By introducing iodine ions into the sulfide electrolyte, the team created an iodine-rich interface that attracts lithium ions, ensuring a stable and tight contact between the electrode and electrolyte without external pressure [3][4] Group 2: Performance and Applications - The energy density of the new battery design can exceed 500 Wh/kg, significantly higher than current lithium iron phosphate batteries (approximately 200 Wh/kg) and ternary lithium batteries (up to 300 Wh/kg), potentially doubling the range of electric vehicles [4][5] - The removal of the external pressure system increases the volume of active materials within the battery pack, enhancing overall performance and safety [4][5] Group 3: Resource Efficiency and Sustainability - The new technology reduces reliance on scarce metals like cobalt and nickel by enabling the use of more abundant and cost-effective materials such as sulfur and sulfides for the positive electrode [5] - This shift aligns with sustainable development strategies in battery materials, addressing concerns over resource scarcity and price volatility [5] Group 4: Global Positioning - The breakthrough positions China as a partial leader in the global race for all-solid-state battery technology, moving from a significant "follower" to a key "leader" in the field [6] - The research has garnered international attention and praise, with experts acknowledging its potential to overcome critical bottlenecks in the commercialization of solid-state batteries [5][6]