A Sub-Square-Millimeter Microbattery with Milliampere-Hour-Level Footprint Capacity,Advanced Energy Materials

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A Sub-Square-Millimeter Microbattery with Milliampere-Hour-Level Footprint Capacity
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-06-11 , DOI: 10.1002/aenm.202200714
Zhe Qu _{1,

2,

3} , Minshen Zhu _{1,

3} , Yin Yin ₁ , Yang Huang ₄ , Hongmei Tang _{1,

2,

3} , Jin Ge ₁ , Yang Li _{1,

2,

3} , Dmitriy D. Karnaushenko ₁ , Daniil Karnaushenko ₁ , Oliver G. Schmidt _{1,

2,

3,

5}

Affiliation

As substantial progress has been made to miniaturize intelligent microsystems to the sub-square-millimeter scale, there is a desperate need to move beyond existing microbattery technologies to offer adequate energy at the same footprint. A micro-origami technology able to wind up a flat layer stack into a Swiss roll presents a promising approach in this regard because it mimics the most successful way to make energy-dense full-sized batteries. Here, an on-chip Swiss-roll current collector made via the micro-origami process is developed and it is infused with a MnO₂ slurry comprising a zincophilic binder. The zincophilic binder layer enhances zinc ion transportability and suppresses MnO₂ dissolution. The MnO₂ Swiss-roll microelectrode is used to create an on-chip microbattery with a small electrode footprint area of 0.75 mm², which shows a footprint capacity up to 3.3 mAh cm^–2. The microbattery demonstrates a reversible capacity of more than 1 mAh cm^–2 for 150 cycles. The battery stability can be improved to over 600 cycles at a 50% depth of discharge. An on-chip integration of a microsystem with the microbattery is demonstrated. The microbatteries set foot in the untrodden sub-square-millimeter area providing adequate energy for ever more miniaturized intelligent microsystems.

中文翻译：

具有毫安时级足迹容量的亚平方毫米微电池

随着将智能微系统小型化到亚平方毫米规模取得了实质性进展，迫切需要超越现有的微型电池技术，在相同的占地面积内提供足够的能量。能够将扁平层堆叠成瑞士卷的微型折纸技术在这方面提供了一种有前途的方法，因为它模仿了制造能量密集型全尺寸电池的最成功方法。在这里，开发了一种通过微型折纸工艺制成的片上 Swiss-roll 集电器，并注入了包含亲锌粘合剂的 MnO _2浆料。亲锌粘合剂层提高锌离子传输能力并抑制MnO ₂溶解。_二氧化锰^{Swiss-roll 微电极用于制造具有 0.75 mm 2}小电极占用面积的片上微电池，其占用容量高达 3.3 mAh cm ^–2。该微型电池在 150 次循环中表现出超过 1 mAh cm ^{–2的可逆容量。}在 50% 的放电深度下，电池稳定性可以提高到 600 次以上。演示了微系统与微电池的片上集成。微型电池涉足了未被践踏的亚平方毫米区域，为越来越小型化的智能微系统提供了充足的能量。

更新日期：2022-06-11

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