Junying Zhang

Beijing University of Chemical Technology

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Zhi‐Ling Hou

Beijing University of Technology

Xiaoming Zhang

Minzu University of China

Chuanbo Li

Minzu University of China

Chuanbo Li

Minzu University of China

Buwen Cheng

Chinese Academy of Sciences

Song Bi

Xi'an High Tech University

Peipei Ma

Xidian University

Lichun Zhang

North China Electric Power University

Jun Zheng

Institute of Semiconductors

Zishan Yang

Xinxiang Medical University

Cooperative Institutions

Beijing University of Chemical Technology

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Minzu University of China

Institute of Semiconductors

State Key Laboratory on Integrated Optoelectronics

Shanghai Jiao Tong University

Beijing Institute of Technology

Xi'an Jiaotong University

Wuhan University

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Core‐Shell‐Structured SiO_x—C Composite for Lithium‐Ion Battery Anodes

Energy Technology (2018)

Junying Zhang Peipei Ma Xiaoming Zhang Zhi Liu Jun Zheng

A simple method to synthesize a uniform composite material consisting of wet‐milled SiO x core and carbon shell is studied. This SiO x —C core‐shell composite is then used as anode materials for lithium‐ion batteries, with wet‐milled SiO x and raw SiO x anodes used for comparison. It is found that the batteries fabricated with wet‐milled SiO x —C composite show the best cyclic performance and excellent rate capability compared with wet‐milled SiO x and raw SiO x . This approach is beneficial because of the reduced size of wet‐milled SiO x powders. The coating of carbon shell is effective in improving the conductivity of SiO x and diminishing the volume effect during lithiation/delithiation processes. Moreover, the Li 2 O and Li 4 SiO 4 generated in the first cycle further suppress the volume effects. Under the galvanostatic mode with charging and discharging current density of 0.1 Ag −1 , the wet‐milled SiO x —C composite electrode delivers an initial reversible capacity of 1279 mAh g −1 , with a capacity retention as high as 97.3% (1244 mAh g −1 ) even after 170 cycles and coulombic efficiency as high as 99.8%. This approach is simple and has great potential for the large‐scale production of high‐performance SiO x ‐based anode materials.

Carbon fibers

10.1002/ente.201800800

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Citations (15)

Progress on thermally conductive adhesive for electronic packaging

Xibing Zhan Tianpeng Jin Junying Zhang Jue Cheng

With the development of miniaturization of electrical and electronic components, the dissipation of heat has become urgent issue. TCAs play an important role in bonding and packaging of electronic devices and resolve the problem of heat dissipation. Currently, the research on TCAs involves preparation of filler, modification of filler surface, filling model and the influence of interface between filler and matrix resin on heat conductivity and other properties of TCAs. Many researchers have made contribution to the theory model and mechanism of TCAs, but there is no a theory or model that can be suitable for all types of fillers. So it's a long way to go for the development of TCAs, and we believe that TCAs will bring revolutionary change for the electrical and electronic developments.

Filler (materials)

Electronic Packaging

Electronic component

10.1109/isapm.2011.6105736

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Citations (1)

KNd(WO4)2の成長とスペクトル特性

Materials Letters (2016)

Yao Qian Junying Zhang Jing Li Jiyang Wang

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Silicon Nanospheres Supported on Conductive MXene Nanosheets as Anodes for Lithium-Ion Batteries

ACS Applied Energy Materials (2022)

Hui Zhou Junying Zhang Jingzhuang Liu Shuai Feng Chuanbo Li

Silicon (Si) anodes are expected to be employed in future for lithium-ion batteries (LIBs), due to their high capacity. However, the main challenge is to assemble Si with conductive materials to increase the conductivity and stability of Si anodes. In this work, we optimized a method to prepare Si nanoparticles (NP)/MXene anode materials for LIBs via electrostatic assembly of positively charged Si nanospheres, coated with poly-diallyl dimethyl ammonium chloride, and negatively charged MXene nanosheets, which increase the number of active sites for strong Si NP attachment and minimize both restacking of MXene nanosheets and Si NP aggregation. The Si NP/MXene anodes have a capacity of 1917.9 mA h g–1 after 300 charge/discharge cycles at 0.5 A g–1. The electrochemical characterization of Si NP/MXene nanocomposite shows high energy storage, cycle stability, and rate performance. Optimization of Si/MXene composites can improve their performance as anode materials for high energy density LIBs.

10.1021/acsaem.2c02706

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Citations (14)

A highly directional metamaterial-based terahertz circulator that does not require an external magnetic field

Journal of Physics D Applied Physics (2020)

Wei Xue Junying Zhang Jun-Wen Ma Zhi‐Ling Hou Quanliang Zhao

Abstract Circulators, as passive non-reciprocal devices, have excellent potential for application in wireless communication and radar-signal processing. However, the construction of terahertz (THz)-frequency circulators is extremely difficult. Here, an electromagnetic matching model for metamaterials is proposed to support the design of a THz circulator with a wider operating bandwidth. The resulting circulator can work without an external magnetic field in the THz frequency range. The best isolation of this THz circulator is 20.9 dB, and its maximum directionality is 16.6 dB. These results validate a new method for the design of metamaterial-based THz devices.

Circulator

Optical circulator

Split-ring resonator

10.1088/1361-6463/abcc93

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Citations (7)

Storage Life Prediction of Carbon Fiber Composites Based on Electrical Conductivity

Fibers and Polymers (2023)

Zishan Yang Shucheng Deng Junying Zhang

Service life

10.1007/s12221-023-00433-z

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Citations (1)

High-Sensitivity and Ultrafast-Response Ethanol Sensors Based on Graphene Oxide

ACS Applied Materials & Interfaces (2020)

Xue‐Qing Zhu Junying Zhang Qing Xie Zhi‐Ling Hou

Ethanol sensors with ultrafast response and high sensitivity have attracted much attention to be applied to daily industrial production processes. In this work, graphene oxide–aniline (GOA) sensors are proposed to meet the requirements of detecting ethanol concentration. Graphene oxide is an outstanding material that has excellent electrical and thermal conductivity, large specific surface area, and high carrier mobility. Because of its special bonding reactions, GOA has advantages of good dispersibility, good electrical conductivity, insolubility in water, and strong plasticity. When testing ethanol concentration with sensors, there will be a lag time, which determines the sensitivity of the sensors. To the best of our knowledge, the GOA sensors in this work have the fastest response time, which is only 27 ms. The GOA ethanol sensors show a good ethanol sensing performance, including excellent sensitivity, cycle stability, and long-term stability.

Response time

Thermal Stability

10.1021/acsami.0c12196

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Citations (33)

Silicon-based anode materials for high capacity lithium ion batteries

Junying Zhang Chuanbo Li

10.11605/cp.nmc2017.01029

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Broadband and strong microwave absorption combining excellent EMI shielding of VGCF/carbonyl iron composites derived from synergistic magnetic and dielectric losses

Carbon (2023)