High‐Performance Packaged 3D Lithium‐Ion Microbatteries Fabricated Using Imprint Lithography,Advanced Materials

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High‐Performance Packaged 3D Lithium‐Ion Microbatteries Fabricated Using Imprint Lithography
Advanced Materials ( IF 27.4 ) Pub Date : 2020-11-26 , DOI: 10.1002/adma.202006229
Pengcheng Sun ₁ , Xiangming Li ₂ , Jinyou Shao ₂ , Paul V. Braun ₁

Affiliation

Fabrication of high‐energy‐density and high‐power‐density packaged long‐cycle‐life rechargeable microbatteries remains a considerable challenge. Here, high‐performance microbatteries with high active volume fraction, thick, 3D‐structured electrodes (V₂O₅ cathode and Li metal anode) are realized through a combination of imprint lithography, self‐assembly, and electrodeposition. To assist the critical challenge of hermetic packaging, the microbattery is infilled with a gel electrolyte. The packaged cell exhibits high areal energy and power densities of 1.24 J cm⁻² and 75.5 mW cm⁻², respectively, and can be cycled 550 times in argon or 200 times in air with 75% capacity retention of the initial discharge capacity. An unpackaged cell, using a liquid electrolyte, provides a power density of 218 mW cm⁻². As far as it is known, the microbatteries have the highest peak power density among all reported microbatteries.

中文翻译：

使用压印光刻技术制造的高性能包装3D锂离子微型电池

高能量密度和高功率密度包装的长寿命可充电微型电池的制造仍然是一个巨大的挑战。在这里，通过结合压印光刻，自组装和电沉积，可以实现具有高活性体积分数，厚的3D结构电极（V ₂ O ₅阴极和Li金属阳极）的高性能微电池。为了应对密封包装的严峻挑战，微电池充满了凝胶电解质。封装后的电池展现出1.24 J cm ^-2和75.5 mW cm ^-2的高面能量和功率密度分别可以在氩气中循环550次或在空气中循环200次，并保留初始放电容量的75％。使用液体电解质的未包装电池提供的功率密度为218 mW cm ^-2。据了解，在所有报告的微型电池中，微型电池的峰值功率密度最高。

更新日期：2021-01-04

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