单晶半导体层状有机阴极为高能全固态电池供电
Single-Crystalline, Semiconductive Layered Organic Cathode Powers High-Energy All-Solid-State Batteries.
摘要(中文译文)
全固态电池（ASSBs）为实现更高的安全性和能量密度提供了途径，但其发展仍受限于复合正极中离子传输缓慢和活性材料负载量低的问题。有机正极材料为金属基体系提供了一种可持续的替代方案，然而其在固态架构中的应用受到电子电导率差和电极微观结构效率低的制约。在此，我们将一种高容量、半导体型、单晶层状有机正极集成到全固态电池中，并证明其电化学性能可与传统体系相媲美。通过对正极组成的系统优化，确定了一种构型，该构型在25 mA g⁻¹电流密度下可提供310 mAh g⁻¹的比容量，并在室温、中等压力条件下经过100次循环仍保持稳定循环性能。在该倍率下，该架构实现了638 Wh kg⁻¹的活性材料级能量密度。通过与单壁碳纳米管复合以及升高温度运行，性能限制得到了缓解。电化学阻抗谱表明，相对于传统固态正极，界面行为简化且副反应受到抑制；而原位测量揭示了由结构演变与位点占据之间相互作用所产生的火山形锂离子扩散行为。这些结果明确了有机固态正极的设计约束，并确立了其作为下一代固态储能功能组件的可行性。
Abstract
All-solid-state batteries (ASSBs) offer a pathway to improved safety and increased energy density but remain limited by sluggish ion transport and low active material loading in composite cathodes. Organic cathode materials provide a sustainable alternative to metal-based systems, yet their implementation in solid-state architectures is constrained by poor electronic conductivity and inefficient electrode microstructures. Here, we integrate a high-capacity, semiconductive, single-crystalline layered organic cathode into ASSBs and demonstrate an electrochemical performance comparable to that of conventional systems. Systematic optimization of cathode composition identifies a configuration that delivers a specific capacity of 310 mAh g at 25 mA g with stable cycling over 100 cycles at room temperature under moderate pressure. At this rate, the architecture achieves an active-material-level energy density of 638 Wh kg. Performance limitations are mitigated through compositing with single-walled carbon nanotubes and operation at an elevated temperature. Electrochemical impedance spectroscopy indicates simplified interfacial behavior and suppressed side reactions relative to conventional solid-state cathodes, while in situ measurements reveal volcano-shaped lithium-ion diffusion behavior arising from the interplay between structural evolution and site occupancy. These results define design constraints for organic solid-state cathodes and establish their viability as functional components in next-generation solid-state energy storage.
如何引用
AMA
Junyong Mo, Jiande Wang, Mircea Dincă. Single-Crystalline, Semiconductive Layered Organic Cathode Powers High-Energy All-Solid-State Batteries.. ACS central science. 2026; doi:10.1021/acscentsci.6c00267.
APA
Junyong Mo, Jiande Wang, Mircea Dincă (2026). Single-Crystalline, Semiconductive Layered Organic Cathode Powers High-Energy All-Solid-State Batteries.. ACS central science. https://doi.org/10.1021/acscentsci.6c00267
GB/T 7714
Junyong Mo, Jiande Wang, Mircea Dincă. Single-Crystalline, Semiconductive Layered Organic Cathode Powers High-Energy All-Solid-State Batteries.[J]. ACS central science, 2026 doi:10.1021/acscentsci.6c00267.
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