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316 results on '"Cao, Gaoping"'

18. Polymer Engineering Enables High Linear Capacity Fiber Electrodes by Microenvironment Regulation.

Author

Li, Yuan, Wang, Yibo, Liu, Yan, Yan, Fang, Zhu, Zhenwei, Chen, Xibang, Qiu, Jingyi, Zhang, Hao, and Cao, Gaoping

Subjects
ELECTRODES, FIBERS, POLYMER networks, STRUCTURAL dynamics, ENERGY density, CARBON nanotubes
Abstract

Unlike bulky and rigid traditional power systems, 1D fiber batteries possess appealing features such as flexibility and adaptability, which are promising for use in wearable electronic devices. However, the performance and energy density fiber batteries are limited by the contradiction between ionic transfer and robust structure of fiber electrodes. Herein, these problems are addressed via polymer engineering to regulate the microenvironment in electrodes, realizing high‐linear‐capacity thick fiber electrodes with excellent cycling performance. The porosity of the electrodes is regulated using polymer crosslink networks designed with various components, and lithium‐ion transfer is optimized through ether‐abundant polymer chains. Furthermore, reinforced covalent bonding with carbon nanotube networks is established based on the modified functional groups of polymer networks. The multiscale optimizations of the porous structure, ionic transportation, and covalent bonding network enhance the lithium‐ion dynamics property and structural stability. Therefore, ultrahigh linear‐capacity fiber electrodes (17.8 mAh m−1) can be fabricated on a large scale and exhibit excellent stability (92.8% after 800 cycles), demonstrating obvious superiority among the reported fiber electrodes. Moreover, this study highlights the high effectiveness of polymer regulation in fiber electrodes and offers new avenues for designing next‐generation wearable energy‐storage systems. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Enhanced 3D framework composite solid electrolyte with alumina-modified Li1.4Al0.4Ti1.6(PO4)3 for solid-state lithium battery.

Author

Chen, Long, Zhu, Feng, Ma, Dongjuan, Liu, Yan, Yan, Fang, Qiu, Jingyi, Cao, Gaoping, and Zhang, Hao

Abstract

Lithium ion (Li+) battery with conventional liquid electrolyte has typical and notorious security risk. Composite solid electrolyte integrating the merits of various electrolyte systems is an attractive alternative of liquid electrolyte for new-type safety and long-life lithium (Li) batteries. Herein, a 3D framework composite solid electrolyte based on Al2O3-modified Li1.4Al0.4Ti1.6(PO4)3 (Al2O3@LATP) was prepared by solution casting and scraping method. The 3D framework composite electrolyte exhibits admirable ionic conductivity (1.1 × 10−4 S cm−1 at 60 °C), wide voltage window (4.8 V vs. Li/Li+), good thermal stability, and satisfactory electrolyte/electrode interfacial compatibility. The Al2O3@LATP can not only impede Li dendrite growth, but also avoid the LATP reaction with Li anode. The assembled solid-state LiFePO4|Li battery with 3D framework composite solid electrolyte delivers a satisfactory capacity retention up to 95.2% after 400 cycles at 0.5 C and under 60 °C. The 3D framework structural design of solid electrolyte affords a promising option for realizing safe energy storage systems. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Bifunctional Sulfonated Graphene-Modified LiNi0.5Mn1.5O4 for Long-Life and High-Energy-Density Lithium-Ion Batteries

Author

Hai Ming, Huiling Chen, Li Meng, Yuehua Wen, Jingyi Qiu, Pengcheng Zhao, Songtong Zhang, Pan He, and Cao Gaoping

Subjects
Materials science, Graphene, Energy Engineering and Power Technology, chemistry.chemical_element, Ion, law.invention, chemistry.chemical_compound, chemistry, Chemical engineering, law, Materials Chemistry, Electrochemistry, Energy density, Chemical Engineering (miscellaneous), Lithium, Electrical and Electronic Engineering, Bifunctional
Published
2021

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