Abstract
Aluminum-air batteries possess high theoretical specific capacities and energy densities. However, the desired application performance in the field of flexible electronics is limited by the rigid battery structure and slow kinetics of the oxygen reduction reaction (ORR). To address these issues, flexible, stretchable, and customizable aluminum-air batteries with a reference to honeycomb shape are composed of multilayer single battery units to achieve large scalability and start-stop control. The single aluminum-air battery combines MnO2 with N/S codoped graphene to improve the electrocatalytic activity. Benefiting from an efficient electrocatalyst and reasonable structural design, the single aluminum-air battery exhibits excellent electrochemical characteristics under deformation conditions with a high specific capacity and energy density (1203.2 mAh g-1 Al and 1630.1 mWh g-1 Al). Furthermore, the obtained honeycomb-shaped stretchable aluminum-air batteries maintain a stable output voltage over the 2500% stretching. More interestingly, the stretchable honeycomb structure not only can solve the start-stop control problem but also has the potential to reduce the self-corrosion in disposable metal-air batteries. In addition, owing to the customizable shapes and sizes, the honeycomb-shaped stretchable aluminum-air batteries facilitate the integrated application of flexible batteries in wearables. ©
| Original language | English |
|---|---|
| Pages (from-to) | 12954-12962 |
| Number of pages | 9 |
| Journal | Langmuir |
| Volume | 36 |
| Issue number | 43 |
| Early online date | 25 Oct 2020 |
| DOIs | |
| Publication status | Published - 3 Nov 2020 |
| Externally published | Yes |
Funding
This work is supported by the Earth Engineering Center and the Center for Advanced Materials for Energy and the Environment at Columbia University, and the School of Chemical Engineering, Northwest University. Support from the National Natural Science Foundation of China (11572238 and 11872302) and the Key R&D Program of Shaanxi (2018ZDXM-GY-131) is acknowledged. Moreover, the project is supported by the Natural Science Basic Research Plan in Shaanxi Province, China (program no. 2019JQ-431).