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223 results on '"Liu, Chaozheng"'

48. Deploying Cationic Cellulose Nanofiber Confinement to Enable High Iodine Loadings Towards High Energy and High‐Temperature Zn‐I2 Battery.

Author

Li, Zhenglin, Cao, Wenwen, Hu, Tao, Hu, Yichan, Zhang, Rong, Cui, Huilin, Mo, Funian, Liu, Chaozheng, Zhi, Chunyi, and Liang, Guojin

Subjects
CELLULOSE, SURFACE charges, IODINE, POWER density, ENERGY density, STRUCTURAL frames
Abstract

High iodine loading and high‐temperature adaptability of the iodine cathode are prerequisites to achieving high energy density at full battery level and promoting the practical application for the zinc‐iodine (Zn‐I2) battery. However, it would aggravate the polyiodide shuttle effect when employing high iodine loading and working temperature. Here, a sustainable cationic cellulose nanofiber (cCNF) was employed to confine the active iodine species through strong physiochemical adsorption to enlarge the iodine loading and stabilize it even at high temperatures. The cCNF could accommodate dual‐functionality by enlarging the iodine loading and suppressing the polyiodide shuttle effect, owing to the unique framework structure with abundant surface positive charges. As a result, the iodine cathode based on the cCNF could deliver high iodine mass loading of 14.1 mg cm−2 with a specific capacity of 182.7 mAh g−1, high areal capacity of 2.6 mAh cm−2, and stable cycling over 3000 cycles at 2 A g−1, thus enabling a high energy density of 34.8 Wh kg−1 and the maximum power density of 521.2 W kg−1 at a full Zn‐I2 battery level. In addition, even at a high temperature of 60 °C, the Zn‐I2 battery could still deliver a stable cycling. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Electrostatic Self‐Assembly of Ti3C2Tx MXene/Cellulose Nanofiber Composite Films for Wearable Supercapacitor and Joule Heater.

Author

Zhou, Guoqiang, Wang, Xiao, Wan, Ting, Liu, Chaozheng, Chen, Weimin, Jiang, Shaohua, Han, Jingquan, Yan, Youguo, Li, Meichun, and Mei, Changtong

Subjects
ANTHOLOGY films, CELLULOSE, HYDROGEN bonding interactions, HEATING, ELECTRIC conductivity, TITANIUM carbide
Abstract

The titanium carbide nanosheets (MXene) hold great potential for fabricating high‐performance electronics due to their two‐dimensional layered structure, high electrical conductivity, and versatile surface chemistry. However, assembling the small MXene nanosheets into flexible macroscopic films for wearable electronics still remains a challenge. Herein, we report the hierarchical assembling of MXene nanosheets and cellulose nanofibers into high‐performance composite films via an electrostatic self‐assembly strategy induced by polyethyleneimine. Benefited from the nacre‐like microstructure of MXene "bricks" and cellulose nanofibers "mortars" interlocked by polyethyleneimine via hydrogen bonding and electrostatic interaction, composite films possess integrated superior flexibility, high tensile strength, and stable electrical conductivity, which are advantageous for wearable electronic applications. To provide a proof‐of‐concept design, a symmetric quasi‐solid‐state supercapacitor with the as‐prepared composite film as electrode is fabricated, which exhibits a specific capacitance of 93.9 mF cm−2 at a current density of 0.1 mA cm−2 and almost constant capacitive behavior under different bending states. In addition, the composite film possesses capacities of electrothermal conversion and complete degradation in a hydrogen peroxide solution. These results demonstrate that the electrostatically self‐assembled composite films hold great promise in the development of highly flexible, mechanically robust, and environmentally friendly energy storage and conversion devices. [ABSTRACT FROM AUTHOR]

Published
2023
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