Bidirectional Planar Flexible Snake-Origami Batteries.
Bidirectional Planar Flexible Snake-Origami Batteries.
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DOI：
10.1002/advs.202101372
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发表时间：
2021-10
期刊：
影响因子：
--
通讯作者：
Song WL
中科院分区：
文献类型：
--
作者：
Li N;Chen H;Yang S;Yang H;Jiao S;Song WL
随着商用柔性/可穿戴设备的快速发展，柔性电池作为最佳电源引起了极大的关注。然而，高能量密度和优异的任意变形能力的组合仍然是满足实际应用的关键挑战。受化学分子结构的刚性和柔性特征的启发，设计并制造了具有高能量密度和良好柔性的新型双向柔性蛇折纸锂离子电池（LIB）。柔性蛇折纸电池由刚性和柔性部分组成，其中前者被设计为能量单元，后者被用作变形单元。凭借这种设计的独特功能，与学术界和工业界获得的电池级柔性LIB相比，计算所有组件的制造电池显示出创纪录的357 Wh L−1（133 Wh kg−1）的能量密度。此外，建立了一个设计原则，以验证利用刚性软耦合结构承受各种变形的有效性，电池结构，能量密度和柔性之间的内在关系可以确认。结果表明，双向柔性蛇折纸电池的设计原理和性能将为实现可穿戴设备的高能量柔性电池提供新的可靠策略。受化学分子结构的刚柔耦合特性启发，设计了一种新型可伸缩平面结构的双向蛇折纸柔性电池，其功能单元分为能量单元（刚性链段）和变形单元（柔性链段）两类。所制造的电池表现出357 Wh/L的上级能量密度，沿着强大的储能性能，即使在机械变形下也是如此。
With the rapid development of commercial flexible/wearable devices, flexible batteries have attracted great attention as optimal power sources. However, a combination of high energy density and excellent arbitrary deformation ability is still a critical challenge to satisfy practical applications. Inspired by rigid and soft features of chemical molecular structures, novel bidirectional flexible snake‐origami lithium‐ion batteries (LIBs) with both high energy density and favorable flexibility are designed and fabricated. The flexible snake‐origami battery consists of rigid and soft segments, where the former is designed as the energy unit and the latter served as the deformation unit. With the unique features from such design, the as‐fabricated battery with calculating all the components exhibits a record‐setting energy density of 357 Wh L−1 (133 Wh kg−1), compared with the cell‐scale flexible LIBs achieved from both academic and industry. Additionally, a design principle is established to verify the validity of utilizing rigid‐soft‐coupled structure for enduring various deformations, and the intrinsic relationship between battery structure, energy density, and flexibility can be confirmed. The results suggest that the design principle and performance of bidirectional flexible snake‐origami batteries will provide a new reliable strategy for achieving high energy flexible batteries for wearable devices. A novel bidirectional snake‐origami flexible battery of scalable planar structure is designed, inspired by rigid‐soft coupling features of chemical molecular structures, with two types of functional units, energy unit (rigid segments) and deformation unit (soft segments). The as‐fabricated batteries exhibit superior energy density of 357 Wh/L, along with robust energy storage performance even under mechanical deformation.
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