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1,260 results on '"MA Yanwei"'

211. Critical current degradation behavior of 7-filamentary Ba1−x K x Fe2As2 tapes under uniaxial strain

Author

Liu, Xiao, primary, Shi, Yi, additional, Liu, Fang, additional, Ma, Hongjun, additional, Liu, Huajun, additional, Zhou, Chao, additional, Song, Yuntao, additional, Gao, Jian, additional, Zhu, Yanchang, additional, Zhang, Xianping, additional, Wang, Dongliang, additional, Ma, Yanwei, additional, Zhang, Zhan, additional, Wei, Shaoqing, additional, and Qin, Jinggang, additional

Published
2022
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213. WGCNA analysis revealing molecular mechanism that bio-organic fertilizer improves pear fruit quality by increasing sucrose accumulation and reducing citric acid metabolism

Author

Wang, Zhonghua, primary, Yang, Han, additional, Ma, Yanwei, additional, Jiang, Gaofei, additional, Mei, Xinlan, additional, Li, Xiaogang, additional, Yang, Qingsong, additional, Kan, Jialiang, additional, Xu, Yangchun, additional, Yang, Tianjie, additional, Lin, Jing, additional, and Dong, Caixia, additional

Published
2022
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219. An interfacial covalent bonding coupled ultrafine CuS-nanocrystals/MXene heterostructure for efficient and durable magnesium storage.

Author

Cheng, Zhi, Xu, Yanan, Zhang, Xudong, Peng, Qifan, Wang, Kai, Zhang, Xiong, Sun, Xianzhong, An, Qinyou, Mai, Liqiang, and Ma, Yanwei

Abstract

Rechargeable magnesium batteries (RMBs) hold great potential for large-scale energy storage due to the dendrite-free deposition and high theoretical volumetric capacity of the magnesium anode. However, the sluggish kinetics and poor reversibility of cathodes hinder their development in terms of high capacity and long-term cycling stability. Herein, a confined in situ growth strategy is presented to construct a novel copper sulfide (CuS)/delaminated Ti3C2Tx MXene (d-Ti3C2Tx) heterostructure, where ultrafine CuS nanocrystals are tightly anchored on the d-Ti3C2Tx substrate through S–Ti–C interfacial covalent bonding. Density functional theory (DFT) calculations demonstrate the strong interaction not only enhances the conductivity of CuS, enabling rapid charge transfer, but also effectively maintains structural stability during the charge/discharge process. As a result, the CuS/d-Ti3C2Tx heterojunction exhibited high reversible specific capacity (336.5 mA h g−1) and outstanding rate capability. Remarkably, an impressive long-term cycling performance with a stable capacity of 92.2 mA h g−1 at 1000 mA g−1 was achieved over 1000 cycles. This study demonstrates the feasibility of integrating CuS with d-Ti3C2Tx MXene and provides an avenue for designing high-performance cathode materials for RMBs. [ABSTRACT FROM AUTHOR]

Published
2023
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223. Elucidating the Potassiation Mechanism in SnS2from a First-Principles Perspective

Author

Li, Chen, An, Yabin, Wang, Lei, Wang, Kai, Sun, Xianzhong, Su, Fangyuan, Zhang, Xiong, and Ma, Yanwei

Abstract

As a typical transition-metal dichalcogenide (TMD), SnS2has received significant interest as an anode material for potassium-ion batteries (KIBs) due to its high safety and environmental friendliness. However, according to previous experimental results, the amount of K ions that can be reversibly inserted/extracted per SnS2is limited, and detailed information about the reaction mechanisms during subsequent conversion and alloying processes is still poorly investigated. In this work, we performed first-principles calculations by density functional theory (DFT) to elucidate the potassiation reaction pathways of SnS2as well as phase transformation caused by conversion and alloying. A variety of KxSnS2(0 ≤ x≤ 5) with nonequilibrium structural configurations as the anode material are systematically examined to understand the diffusion energetics, charge transfer, and lattice evolution. It is found that reversible intercalation occurs for KxSnS2(0 ≤ x≤ 1), which transforms to SnS, Sn, K2S, and KSn intermediate phases after the intercalation of K ions in tetrahedral interstitial sites. Based on these findings, the potassiation voltage profile of SnS2is predicted to have a high theoretical capacity of 750 mAh g–1. Our work opens a new avenue for understanding the architectural evolution and potassium storage chemistry for TMDs and provides important guidance for the design of energy-dense two-dimensional anodes in KIBs.

Published
2023
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250. Bioorganic and silicon amendments alleviate early defoliation of pear trees by improving the soil nutrient bioavailability, microbial activity, and reshaping the soil microbiome network

Author

Kang, Yalong, primary, Ma, Yanwei, additional, Wu, Wenli, additional, Zeng, Shaomin, additional, Jiang, Shangtao, additional, Yang, Han, additional, Li, Yan, additional, Wang, Zhonghua, additional, Dong, Caixia, additional, Xu, Yangchun, additional, and Shen, Qirong, additional

Published
2022
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