Hydrogel‐Based Additive Manufacturing of Lithium Cobalt Oxide,Advanced Materials Technologies

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Hydrogel‐Based Additive Manufacturing of Lithium Cobalt Oxide
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-11-11 , DOI: 10.1002/admt.202000791
Daryl W Yee ₁ , Michael A Citrin ₁ , Zane W Taylor ₁ , Max A Saccone ₂ , Victoria L Tovmasyan ₃ , Julia R Greer ₁

Affiliation

3D multicomponent metal oxides with complex architectures can enable previously impossible energy storage devices, particularly lithium‐ion battery (LIB) electrodes with fully controllable form factors. Existing additive manufacturing approaches for fabricating 3D multicomponent metal oxides rely on particle‐based or organic–inorganic binders, which are limited in their resolution and chemical composition, respectively. In this work, aqueous metal salt solutions are used as metal precursors to circumvent these limitations, and provide a platform for 3D printing multicomponent metal oxides. As a proof‐of‐concept, architected lithium cobalt oxide (LCO) structures are fabricated by first synthesizing a homogenous lithium and cobalt nitrate aqueous photoresin, and then using it with digital light processing printing to obtain lithium and cobalt ion containing hydrogels. The 3D hydrogels are calcined to obtain micro‐porous self‐similar LCO architectures with a resolution of ≈100 µm. These free‐standing, binder‐ and conductive additive‐free LCO structures are integrated as cathodes into LIBs, and exhibit electrochemical capacity retention of 76% over 100 cycles at C/10. This facile approach to fabricating 3D LCO structures can be extended to other materials by tailoring the identity and stoichiometry of the metal salt solutions used, providing a versatile method for the fabrication of multicomponent metal oxides with complex 3D architectures.

中文翻译：

基于水凝胶的钴酸锂增材制造

具有复杂结构的 3D 多组分金属氧化物可以实现以前不可能的储能设备，特别是具有完全可控形状因素的锂离子电池 (LIB) 电极。现有的用于制造 3D 多组分金属氧化物的增材制造方法依赖于颗粒基或有机-无机粘合剂，这些粘合剂的分辨率和化学成分分别受到限制。在这项工作中，使用金属盐水溶液作为金属前体来规避这些限制，并为 3D 打印多组分金属氧化物提供平台。作为概念验证，首先合成均质的锂和硝酸钴水性光树脂，然后将其与数字光处理印刷一起使用以获得含锂和钴离子的水凝胶，从而制造出钴酸锂（LCO）结构。将 3D 水凝胶煅烧以获得分辨率约为 100 µm 的微孔自相似 LCO 结构。这些独立式、不含粘合剂和导电添加剂的 LCO 结构作为阴极集成到 LIB 中，在 C/10 的 100 次循环中表现出 76% 的电化学容量保持率。这种制造 3D LCO 结构的简便方法可以通过定制所用金属盐溶液的特性和化学计量扩展到其他材料，从而为制造具有复杂 3D 结构的多组分金属氧化物提供了一种通用方法。

更新日期：2020-11-11

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