超可拉伸紧凑型 Zn-MnO2 可充电电池,ACS Materials Letters

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超可拉伸紧凑型 Zn-MnO2 可充电电池
ACS Materials Letters ( IF 9.6 ) Pub Date : 2023-03-02 , DOI: 10.1021/acsmaterialslett.3c00058
Kang Ji ₁ , Sisi Li ₁ , Yong Lin ₁ , Jiaxue Zhang ₁ , Menglu Wang ₁ , Chong Bai ₁ , Desheng Kong ₁

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可伸缩电子产品的兴起需要可变形形式的可充电电池作为兼容电源。通过提供足够的内部空间来适应拉伸变形，褶皱电极设计是可拉伸电池的有前途的途径。目前的电极通常具有带有可见波纹的粗糙表面，这对为可穿戴系统组装紧凑型电池提出了实际挑战。在这项研究中，我们报告了具有微皱表面纹理的超拉伸电极的设计和制备。皱巴巴的电极是在基于沉积在金属薄膜集电器上的活性材料的转印工艺中产生的。引入聚合物膜作为关键的机械支撑，以有效增强这些电极对大的重复拉伸应变的耐久性。₂可充电电池的总厚度约为 1 毫米。该电池表现出 211 mAh g ^–1的高比容量、稳定的充放电循环性能以及高达 525% 应变的超高变形能力。紧凑的设计使电池能够实现与皮肤的共形附着以及与各种可变形系统的多功能集成。目前的工作提供了一种通用方法来创建具有微皱电极的高度可拉伸电池。

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Ultrastretchable and Compact Zn-MnO2 Rechargeable Battery

The rise of stretchable electronics calls for deformable forms of rechargeable batteries as compatible power sources. The crumpled electrode design is a promising avenue for stretchable batteries by providing sufficient internal space to accommodate tensile deformations. Current electrodes typically have rough surfaces with visible corrugations, which present practical challenges in assembling compact cells for wearable systems. In this study, we report the design and preparation of ultrastretchable electrodes with microwrinkled surface textures. Crumpled electrodes are created in a transfer-printing process based on active materials deposited on metal film current collectors. A polymer membrane is introduced as a key mechanical support to effectively enhance the durability of these electrodes against large and repetitive tensile strains. A stretchable pouch cell of Zn-MnO₂ rechargeable battery is constructed with a total thickness of ∼1 mm. The battery cell demonstrates a high specific capacity of 211 mAh g^–1, stable charge–discharge cycling performances, and ultrahigh deformability of up to 525% strain. The compact design allows the battery to achieve conformal attachment to the skin and versatile integration with various deformable systems. The present work offers a generic approach to creating highly stretchable batteries with microwrinkled electrodes.

更新日期：2023-03-02

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