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Your search keyword '"Cui, Yixiu"' showing total 11 results
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11 results on '"Cui, Yixiu"'

3. Low‐Volatile Binder Enables Thermal Shock‐Resistant Thin‐Film Cathodes for Thermal Batteries.

Author

Xie, Yong, Cao, Yong, Zhang, Xu, Dong, Liangping, Liu, Xiaojiang, Cui, Yixiu, Wang, Chao, Cui, Yanhua, Feng, Xuyong, Xiang, Hongfa, and Qie, Long

Subjects
THERMAL batteries, CATHODES, CHAIN scission, CATHODE efficiency, ACRYLIC acid
Abstract

Manufacturing thin‐film components is crucial for achieving high‐efficiency and high‐power thermal batteries (TBs). However, developing binders with low‐gas production at the operating temperature range of TBs (400–550 °C) has proven to be a significant challenge. Here, we report the use of acrylic acid derivative terpolymer (LA136D) as a low‐volatile binder for thin‐film cathode fabrication and studied the chain scission and chemical bond‐breaking mechanisms in pyrolysis. It is shown LA136D defers to random‐chain scission and cross‐linking chain scission mechanisms, which gifts it with a low proportion of volatile products (ψ, ψ = 39.2 wt%) at even up to 550 °C, well below those of the conventional PVDF (77.6 wt%) and SBR (99.2 wt%) binders. Surprisingly, LA136D contributes to constructing a thermal shock‐resistant cathode due to the step‐by‐step bond‐breaking process. This is beneficial for the overall performance of TBs. In discharging test, the thin‐film cathodes exhibited a remarkable 440% reduction in polarization and 300% enhancement in the utilization efficiency of cathode materials, while with just a slight increase of 0.05 MPa in gas pressure compared with traditional "thick‐film" cathode. Our work highlights the potential of LA136D as a low‐volatile binder for thin‐film cathodes and shows the feasibility of manufacturing high‐efficiency and high‐power TBs through polymer molecule engineering. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Hydrothermal synthesized micro/nano-sized pyrite used as cathode material to improve the electrochemical performance of thermal battery

Author

Feng Xiuli, Cui Yixiu, Liu Xiaojiang, Zhaotang Yang, and Xiaowei Yang

Subjects
Materials science, General Chemical Engineering, Metallurgy, Electrolyte, engineering.material, Electrochemistry, Hydrothermal circulation, Chemical engineering, Materials Chemistry, engineering, Particle, Thermal stability, Pyrite, Thermal Battery, Power density
Abstract

In this paper, single-phase pyrite with different particle sizes is prepared by hydrothermal method with the reactants of Na2S, S, and FeSO4. Compared with natural pyrite powder, synthesized pyrite nanocubes with small particle sizes and fine distribution have lower resistance, higher specific capacity and power density during the discharging process. The enlarging contacting surface area of pyrite with electrolytes will reduce the concentration polarization caused by the discharging current and improve the utilization efficiency of the pyrite materials. When pulse currents are loaded, compared with natural pyrite single-cell thermal battery, synthetic ones have smaller voltage drops and higher power density during the pulse discharging process. Influences of particle sizes on the thermal stability of the pyrite powders have also been investigated.

Published
2014

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