上海交通大学×复旦大学合作发表最新Nature论文

Core Viewpoint - The article discusses a groundbreaking research on high-voltage, anode-free sodium-sulfur batteries, which could provide a sustainable energy storage solution, overcoming limitations of traditional lithium-based systems [3][5]. Group 1: Research Breakthrough - The research team transformed the low-valence reaction path (S0/S2-) of traditional sodium-sulfur batteries into a high-valence reaction path (S0/S4+), creating a new battery system that operates at a significantly higher discharge voltage of 3.6 V [3][5]. - This new battery design eliminates the need for metallic sodium during production, enhancing safety and cost-effectiveness [5]. Group 2: Performance Metrics - The new sodium-sulfur battery achieves an energy density of up to 1198 Wh/kg and a power density of 23773 W/kg, based on total electrode mass calculations [5]. - The introduction of an 8 wt% bismuth-coordinated covalent organic framework catalyst in the sulfur cathode significantly improves the discharge capacity to 1206 mAh/g (sulfur + catalyst), leading to an energy density of 2021 Wh/kg [5]. Group 3: Cost and Application Potential - The estimated cost of the anode-free sodium-sulfur battery is $5.03 per kWh, indicating excellent scalability and potential for widespread application [7]. - This technology presents significant opportunities in energy storage for power grids and wearable electronic devices, addressing key performance limitations of traditional alkali metal-sulfur battery systems [7].