材料科学
碳纤维
电池(电)
钠离子电池
热解
插层(化学)
电极
阳极
立体光刻
纳米技术
化学工程
离子
阴极
复合材料
法拉第效率
复合数
无机化学
化学
有机化学
功率(物理)
物理
量子力学
物理化学
工程类
作者
Yuto Katsuyama,Akira Kudo,Hiroaki Kobayashi,Jonghee Han,Luyang Chen,Itaru Honma,Richard B. Kaner
出处
期刊:Small
[Wiley]
日期:2022-06-20
卷期号:18 (29)
被引量:20
标识
DOI:10.1002/smll.202202277
摘要
Increasing mass loadings of battery electrodes critically enhances the energy density of an overall battery by eliminating much of the inactive components, while compacting the battery size and lowering the costs of the ingredients. A hard carbon microlattice, digitally designed and fabricated by stereolithography 3D-printing and pyrolysis, offers enormous potential for high-mass-loading electrodes. In this work, sodium-ion batteries using hard carbon microlattices produced by an inexpensive 3D printer are demonstrated. Controlled periodic carbon microlattices are created with enhanced ion transport through microchannels. Carbon microlattices with a beam width of 32.8 µm reach a record-high areal capacity of 21.3 mAh cm-2 at a loading of 98 mg cm-2 without degrading performance, which is much higher than the conventional monolithic electrodes (≈5.2 mAh cm-2 at 92 mg cm-2 ). Furthermore, binder-free, pure-carbon elements of microlattices enable the tracking of structural changes in hard carbon that support the hypothesized intercalation of ions at plateau regions by temporal ex situ X-ray diffraction measurements. These results will advance the development of high-performance and low-cost anodes for sodium-ion batteries as well as help with understanding the mechanisms of ion intercalations in hard carbon, expanding the utilities of 3D-printed carbon architectures in both applications and fundamental studies.
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