Light/Electricity Energy Conversion and Storage for a Hierarchical Porous In2 S3 @CNT/SS Cathode towards a Flexible Li-CO2 Battery.,Angewandte Chemie International Edition

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Light/Electricity Energy Conversion and Storage for a Hierarchical Porous In2 S3 @CNT/SS Cathode towards a Flexible Li-CO2 Battery.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-05-17 , DOI: 10.1002/anie.202005053
De-Hui Guan _{1,

2} , Xiao-Xue Wang _{1,

2} , Ma-Lin Li _{1,

2} , Fei Li ₁ , Li-Jun Zheng ₁ , Xiao-Lei Huang ₃ , Ji-Jing Xu _{1,

2}

Affiliation

A photoinduced flexible Li‐CO₂ battery with well‐designed, hierarchical porous, and free‐standing In₂S₃@CNT/SS (ICS) as a bifunctional photoelectrode to accelerate both the CO₂ reduction and evolution reactions (CDRR and CDER) is presented. The photoinduced Li‐CO₂ battery achieved a record‐high discharge voltage of 3.14 V, surpassing the thermodynamic limit of 2.80 V, and an ultra‐low charge voltage of 3.20 V, achieving a round trip efficiency of 98.1 %, which is the highest value ever reported (<80 %) so far. These excellent properties can be ascribed to the hierarchical porous and free‐standing structure of ICS, as well as the key role of photogenerated electrons and holes during discharging and charging processes. A mechanism is proposed for pre‐activating CO₂ by reducing In³⁺ to In⁺ under light illumination. The mechanism of the bifunctional light‐assisted process provides insight into photoinduced Li‐CO₂ batteries and contributes to resolving the major setbacks of the system.

中文翻译：

分层多孔In2 S3 @ CNT / SS阴极对柔性Li-CO2电池的光/电能量转换和存储。

一种光诱导柔性Li-CO ₂电池，具有设计良好，分层多孔且独立的In ₂ S ₃ @ CNT / SS（ICS）作为双功能光电极，可加速CO _2的还原和释放反应（CDRR和CDER）被呈现。光致Li‐CO ₂电池达到了3.14 V的创纪录高放电电压，超过了2.80 V的热力学极限，以及3.20 V的超低充电电压，实现了98.1％的往返效率，这是有史以来的最高值（<80 ％）至今。这些优异的特性可归因于ICS的分层多孔和独立式结构，以及光生电子和空穴在放电和充电过程中的关键作用。一种机制提出了一种用于预激活CO ₂通过减少在³⁺到在⁺下光照明。双功能光辅助过程的机制可提供对光诱导Li-CO ₂电池的深入了解，并有助于解决系统的重大挫折。

更新日期：2020-05-17

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