Superior Oxygen Reduction Reaction on Phosphorus‐Doped Carbon Dot/Graphene Aerogel for All‐Solid‐State Flexible Al–Air Batteries,Advanced Energy Materials

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Superior Oxygen Reduction Reaction on Phosphorus‐Doped Carbon Dot/Graphene Aerogel for All‐Solid‐State Flexible Al–Air Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-12-05 , DOI: 10.1002/aenm.201902736
Mengran Wang ₁ , Yuan Li _{2,

3,

4} , Jing Fang ₁ , Cesar J. Villa ₃ , Yaobin Xu _{3,

4} , Shiqiang Hao ₃ , Jie Li ₁ , Yexiang Liu ₁ , Chris Wolverton ₃ , Xinqi Chen ₄ , Vinayak P. Dravid _{3,

4} , Yanqing Lai ₁

Affiliation

Carbon dots have been recognized as one of the most promising candidates for the oxygen reduction reaction (ORR) in alkaline media. However, the desired ORR performance in metal–air batteries is often limited by the moderate electrocatalytic activity and the lack of a method to realize good dispersion. To address these issues, herein a biomass‐deriving method is reported to achieve the in situ phosphorus doping (P‐doping) of carbon dots and their simultaneous decoration onto graphene matrix. The resultant product, namely P‐doped carbon dot/graphene (P‐CD/G) nanocomposites, can reach an ultrahigh P‐doping level for carbon nanomaterials. The P‐CD/G nanocomposites are found to exhibit excellent ORR activity, which is highly comparable to the commercial Pt/C catalysts. When used as the cathode materials for a primary liquid Al–air battery, the device shows an impressive power density of 157.3 mW cm⁻² (comparing to 151.5 mW cm⁻² of a similar Pt/C battery). Finally, an all‐solid‐state flexible Al–air battery is designed and fabricated based on our new nanocomposites. The device exhibits a stable discharge voltage of ≈1.2 V upon different bending states. This study introduces a unique biomass‐derived material system to replace the noble metal catalysts for future portable and wearable electronic devices.

中文翻译：

全固态柔性铝制空气电池中磷掺杂碳点/石墨烯气凝胶上的卓越氧还原反应

碳点已被认为是碱性介质中氧还原反应（ORR）的最有希望的候选者之一。但是，金属空气电池中所需的ORR性能通常受到适度的电催化活性和缺乏实现良好分散性的方法的限制。为了解决这些问题，据报道，采用生物质衍生方法可实现碳点的原位磷掺杂（P掺杂）并同时装饰在石墨烯基体上。所得产品，即P掺杂的碳点/石墨烯（P-CD / G）纳米复合材料，可以达到碳纳米材料的超高P掺杂水平。已发现P‐CD / G纳米复合材料具有出色的ORR活性，可与市售Pt / C催化剂高度媲美。当用作液态铝空气电池的正极材料时，^-2（与类似的Pt / C电池的151.5 mW cm ^-2相比）。最后，基于我们的新型纳米复合材料设计和制造了全固态柔性铝空气电池。该器件在不同的弯曲状态下表现出约1.2 V的稳定放电电压。这项研究引入了独特的生物质衍生材料系统，以取代贵金属催化剂，用于未来的便携式和可穿戴电子设备。

更新日期：2020-01-22

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