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Cold sintering process for fabrication of a high volumetric capacity Li4Ti5O12 anode
Materials Science and Engineering: B ( IF 3.9 ) Pub Date : 2019-10-28 , DOI: 10.1016/j.mseb.2019.114435
Joo-Hwan Seo , Kris Verlinde , Ramakrishnan Rajagopalan , Enrique D. Gomez , Thomas E. Mallouk , Clive A. Randall

The cold sintering process (CSP) is useful for densifying lithium ion battery composite electrodes to achieve higher volumetric capacity density. Lithium titanate is one of the most promising anode materials to replace graphite in conventional anodes, as it enhances safety in large scale applications. A densified binder-free LTO based anode was fabricated by the cold sintering process. The composite anode was first formed by tape casting with a binder and then was heat treated to remove the binder. The binder-free composite was humidified with water to provide a transient liquid phase and then moved onto a current collector. The wetted composite was cold sintered at 120 °C under a uniaxial pressure of 500 MPa and directly deposited on a current collector. The density of the LTO/CNF composite anode was 2.82 g/cm3 (87% relative density). The volumetric capacity densities of the cold sintered anodes were found to be ~380 mAh/cm3.



中文翻译:

用于制造高容量Li 4 Ti 5 O 12阳极的冷烧结工艺

冷烧结工艺(CSP)可用于致密化锂离子电池复合材料电极,以实现更高的体积容量密度。钛酸锂是最有希望替代传统阳极中的石墨的阳极材料之一,因为它增强了大规模应用中的安全性。通过冷烧结工艺制备了致密的无粘结剂的LTO基阳极。复合阳极首先通过用粘合剂流延成型而形成,然后进行热处理以除去粘合剂。将无粘合剂的复合材料用水加湿以提供瞬态液相,然后将其移至集电器上。将湿润的复合材料在500℃的单轴压力下于120°C进行冷烧结,并直接沉积在集电器上。LTO / CNF复合阳极的密度为2.82 g / cm 3(相对密度为87%)。发现冷烧结阳极的体积容量密度为〜380mAh / cm 3

更新日期:2019-10-28
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