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134 results on '"Da, Xinyu"'

6. Highly Tough Slide‐Crosslinked Gel Polymer Electrolyte for Stable Lithium Metal Batteries.

Author

Deng, Xuetian, Chen, Jing, Jia, Xin, Da, Xinyu, Zhao, Yuanjun, Gao, Yiyang, Gao, Yang, Kong, Xiangpeng, Ding, Shujiang, and Gao, Guoxin

Subjects
POLYMER colloids, POLYELECTROLYTES, LITHIUM cells, IONIC conductivity, ION transport (Biology)
Abstract

Gel polymer electrolytes (GPEs) hold great promise for the practical application of lithium metal batteries. However, conventional GPEs hardly resists lithium dendrites growth and maintains long‐term cycling stability of the battery due to its poor mechanical performance. Inspired by the slide‐ring structure of polyrotaxanes (PRs), herein we developed a dynamic slide‐crosslinked gel polymer electrolyte (SCGPE) with extraordinary stretchability of 970.93 % and mechanical strength of 1.15 MPa, which is helpful to buffer the volume change of electrodes and maintain mechanical integrity of the battery structure during cycling. Notably, the PRs structures can provide fast ion transport channels to obtain high ionic conductivity of 1.73×10−3 S cm−1 at 30 °C. Additionally, the strong polar groups in SCGPE restrict the free movement of anions to achieve high lithium‐ion transference number of 0.71, which is favorable to enhance Li+ transport dynamics and induce uniform Li+ deposition. Benefiting from these features, the constructed Li|SCGPE‐3|LFP cells exhibit ultra‐long and stable cycle life over 1000 cycles and high‐capacity retention (89.6 % after 1000 cycles). Even at a high rate of 16 C, the cells deliver a high capacity of 79.2 mAh g−1. The slide‐crosslinking strategy in this work provides a new perspective on the design of advanced GPEs for LMBs. [ABSTRACT FROM AUTHOR]

Published
2024
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8. CO2‐Assisted Induced Self‐Assembled Aramid Nanofiber Aerogel Composite Solid Polymer Electrolyte for All‐Solid‐State Lithium‐Metal Batteries

Author

Da, Xinyu, primary, Chen, Jing, additional, Qin, Yanyang, additional, Zhao, Jianyun, additional, Jia, Xin, additional, Zhao, Yuanjun, additional, Deng, Xuetian, additional, Li, Yanan, additional, Gao, Na, additional, Su, Yaqiong, additional, Rong, Qiang, additional, Kong, Xiangpeng, additional, Xiong, Junqiao, additional, Hu, Xiaofei, additional, Ding, Shujiang, additional, and Gao, Guoxin, additional

Published
2024
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9. Electric Field Induced Molecular Orientation to Construct the Composite Polymer Electrolytes with Vertically Aligned Ion Diffusion Pathways for Stable Solid-State Lithium Metal Batteries

Author

Gao, Guoxin, primary, Zhao, Yuanjun, additional, Gao, Mengqiu, additional, Qin, Yanyang, additional, Da, Xinyu, additional, Deng, Xuetian, additional, Jia, Xin, additional, Xi, Kai, additional, Su, Yaqiong, additional, Ding, Shujiang, additional, Rong, Qiang, additional, and Kong, Xiangpeng, additional

Published
2024
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11. CO2‐Assisted Induced Self‐Assembled Aramid Nanofiber Aerogel Composite Solid Polymer Electrolyte for All‐Solid‐State Lithium‐Metal Batteries.

Author

Da, Xinyu, Chen, Jing, Qin, Yanyang, Zhao, Jianyun, Jia, Xin, Zhao, Yuanjun, Deng, Xuetian, Li, Yanan, Gao, Na, Su, Yaqiong, Rong, Qiang, Kong, Xiangpeng, Xiong, Junqiao, Hu, Xiaofei, Ding, Shujiang, and Gao, Guoxin

Subjects
*SUPERIONIC conductors, *SOLID electrolytes, *POLYELECTROLYTES, *AEROGELS, *LITHIUM cells, *ENERGY density, *DENDRITIC crystals, *LITHIUM
Abstract

All‐solid‐state lithium metal batteries (ASSLMBs) hold great promise for the development of next‐generation high‐safety, high‐energy‐density lithium batteries, but still face the challenges of lithium dendrite growth and thickness. Herein, the ultrathin PEO‐based composite solid polymer electrolyte (denoted as PAL) supported by a low‐density self‐supporting aramid nanofiber (ANF) aerogel framework is developed. The ANF aerogel obtained by a novel CO2‐assisted induced self‐assembly method has a well‐designed bilayer structure with double cross‐linking degree. Benefiting from the intermolecular interaction between ANFs and PEO, the PAL achieves an ultrathin thickness (20 µm) with excellent thermal stability and mechanical strength. Meanwhile, due to the modulation of ionic pathways by the functionalized ANF, the PAL achieves uniform lithium deposition without dendrites, resulting in stable long cycling (1400 h) for symmetric cells. Consequently, the Li|PAL|LiFePO4 (LFP) cell has excellent long‐term cycling stability (1 C, >700 cycles, Coulombic efficiency > 99.8%) and fast charge/discharge performance (rate, 10 C). More practically, the Li|PAL|LFP cell achieves an energy density of 180 Wh kg−1 due to the ability to match a high‐loading (8 mg cm−2) cathode. Furthermore, the double‐layer Li|PAL|LFP pouch cell demonstrates excellent flexibility and safety in cycling and abuse tests. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Cooperative Trajectory Planning and Resource Allocation for UAV-Enabled Integrated Sensing and Communication Systems

Author

Pan, Yu, Li, Ruoguang, Da, Xinyu, Hu, Hang, Zhang, Miao, Zhai, Dong, Cumanan, Kanapathippillai, and Dobre, Octavia A.

Abstract

The flexibility and controllable mobility of unmanned aerial vehicles (UAVs) render them easier to become aerial platforms carrying out integrated sensing and communication (ISAC) functionality, and the cooperation among multiple UAVs is a promising way to achieve simultaneous multi-static radar sensing and coordinated multiple point (CoMP) transmission, leading to an enhanced ISAC service. However, due to the intrinsically limited resources that UAVs can utilize, it is challenging to achieve performance improvement for dual purposes. Toward this end, in this paper, an orthogonal frequency division multiple access (OFDMA) UAV-enabled ISAC system is investigated, and a joint trajectory planning and resource allocation problem is formulated to minimize the Cramér-Rao lower bounds (CRLB) for target location estimation while guaranteeing the communication quality-of-service (QoS) constraints. The formulated problem is non-convex and difficult to solve in general, and we first decompose the original problem into three sub-problems and then propose the corresponding algorithms to obtain the optimal solutions efficiently. The extensive simulations demonstrate the convergence of the proposed algorithm and the performance improvement on the localization with different communication requirements compared to conventional techniques.

Published
2024
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17. Photoelastic Organogel with Multiple Stimuli Responses

Author

Gao, Yiyang, primary, Sun, Danqi, additional, Chen, Jing, additional, Xi, Kai, additional, Da, Xinyu, additional, Guo, Haoyu, additional, Zhang, Dongyang, additional, Gao, Ting, additional, Lu, Tongqing, additional, Gao, Guoxin, additional, Shi, Lei, additional, and Ding, Shujiang, additional

Published
2022
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20. Birefringent elastomers with Multiple Stimuli-Responses

Author

Gao, Yiyang, primary, Sun, Danqi, additional, Chen, Jing, additional, Shi, Lei, additional, Da, Xinyu, additional, Guo, Haoyu, additional, Xi, Kai, additional, Zhang, Dongyang, additional, Gao, Ting, additional, Gao, Guoxin, additional, Lu, Tongqing, additional, and Ding, Shujiang, additional

Published
2021
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21. Current‐Density Regulating Lithium Metal Directional Deposition for Long Cycle‐Life Li Metal Batteries

Author

Mao, Heng, primary, Yu, Wei, additional, Cai, Zhuanyun, additional, Liu, Guixian, additional, Liu, Limin, additional, Wen, Rui, additional, Su, Yaqiong, additional, Kou, Huari, additional, Xi, Kai, additional, Li, Benqiang, additional, Zhao, Hongyang, additional, Da, Xinyu, additional, Wu, Hu, additional, Yan, Wei, additional, and Ding, Shujiang, additional

Published
2021
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