Article
Chemistry, Physical
Jinyang Ma, Changsheng Song, Siyu Chen, Yanan Xu, Hongbin Du
Summary: This study presents a low-cost method for preparing SiOx-based anodes with high specific charge capacity and good cycling performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Zhaolin Li, Xin Tao, Yaozong Yang, Nana Yao, Zhao Yang, Dawei Luo, Jie Wang, Hailei Zhao
Summary: By using surface engineering, a graphene-coated microsized SiOx material was successfully achieved, which improves the structural integrity and cyclic performance of the electrode.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Quan Ouyang, Guangshe Li, Xin Zhang, Xu Zhao, Yaowen Wang, Qiao Wang, Zhipeng Fan, Jiaxin Wang, Liping Li
Summary: In this work, a sequential coating strategy was employed to construct a hollow-structured high-capacity SiOx anode, which consisted of an inner nitrogen-doped porous carbon network, a middle mesoporous SiOx layer, and an outer mesoporous carbon layer. The incorporation of high-capacity SiOx via sequential coating significantly improved the specific capacity, while the carbon layers enhanced the electronic conductivity and reduced side reactions. The resulting nanocubes exhibited excellent electrochemical performance, delivering a high capacity even after 500 cycles at a high current density.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Haitao Gu, Yong Wang, Yun Zeng, Meng Yu, Tong Liu, Jian Chen, Ke Wang, Jingying Xie, Linsen Li
Summary: Dopamine-polymerization-guided carbon coating of SiOx anodes improves their electrochemical performance and cycling life. Suppression of cracks and excessive growth of the solid electrolyte interphase (SEI) layer contributes to the enhanced performance and stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xinxin Sun, Zhiyuan Wang, Haohui Zhang, Kaize Si, Xiaomei Wang, Xu Zhang
Summary: In this study, a honeycomb-like SiOx/C nanoarchitecture with carbon coating based on a 3D ordered macroporous (3DOM) structure was developed. The carbon cladding buffers volume expansion and enhances electronic conductivity, resulting in high reversible capacity and good cycling stability in lithium-ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Seongmin Ha, Keebum Hwang, Daesup Kim, Songhun Yoon, Young-Seak Lee
Summary: In this study, pyrolyzed fuel oil is used to modify petroleum residue oil (PRO), and carbon coating is performed on SiOx surfaces to analyze the effects of aromatic compounds from PRO on the electrochemical performance of a lithium-ion battery. The results show that the carbon-coating layer from PRO improves the electrochemical performance of the battery, including cyclic efficiency and specific capacity, due to the formation of a thick carbon-coating layer on the surface of the sample.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Yan Li, Guangyu Chen, Hualong Wu, Helei Ding, Chentong Zhang, Liuqing Huang, Xuetao Luo
Summary: Si/SiOx@ZnO@C nanoparticles were successfully prepared and exhibited excellent rate performance and cycle stability, attributed to the synergistic effect of the triple-protected layer. This work provides a novel and economic strategy for high-performance silicon-based anodes and offers an original approach for recycling and resource utilization of silicon waste.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Huaide Chen, Guojun Xu, Chenxin Jin, Jize Wu, Linwu Xiong, Xiaomin Li, Fugen Sun, Lang Zhou, Zhihao Yue
Summary: This paper presents a method of using C2H2 as a carbon source to coat SiOx material in a rotating chemical vapor deposition furnace, resulting in hard carbon coated SiOx (SiOx@C) material. The discharge specific capacity of SiOx@C remained at 1116.8 mAh g-1 after 140 cycles at a rate of 0.5C, which is 539.8 mAh g-1 higher than SiOx.
Article
Chemistry, Physical
Jizhe Wu, Chenxin Jin, Guojun Xu, Huaide Chen, Bin Lu, Xiaomin Li, Fugen Sun, Lang Zhou, Zhihao Yue
Summary: In this study, cuprous oxide and carbon coated silicon monoxide (SiOx/C/Cu2O) composites were synthesized by high temperature heat treatment. The carbon acts as a buffer for the volume expansion during lithium intercalation, enhances the material's conductivity, and reduces the contact between the electrolyte and the active substance. Cu2O further reduces the contact between the electrolyte and the active substance, buffering the change of electrode structure and improving the overall cycling performance.
SOLID STATE IONICS
(2023)
Article
Chemistry, Physical
Mengmeng Yang, Liwei Jin, Mingyi He, Zao Yi, Tao Duan, Weitang Yao
Summary: Low silicon oxide shows promise as an anode material for LIBs and KIBs due to its high theoretical capacity, but faces challenges such as volume effects and poor intrinsic electronic conductivity. By synthesizing SiOx@C anodes, the cyclic stability and capacity of low silicon oxide have been improved, making it a promising option for future applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Asif Raza, Jae Yup Jung, Cheol-Ho Lee, Byung Gon Kim, Jeong-Hee Choi, Min-Sik Park, Sang-Min Lee
Summary: The study introduces an affordable and scalable synthesis method for double-layered SiOx/Mg2SiO4/SiOx composites, which effectively improves the reversibility and volume variations of silicon-based anode materials during cycling. The highly porous SiOx outer layer and Mg2SiO4 inner layer in the material design offer abundant active sites and restrain volume expansion, leading to high initial Coulombic efficiency and stable cycle performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hye Ji Lee, Sang Wook Kang
Summary: In this study, a high thermal stability CA-CaO separator coated on PP was successfully manufactured. The stability of the separator was improved by enhancing adhesion between CA film and PP film without additional adhesive. Water flux data and analysis confirmed the enhancement of stability of the separator.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zhaolin Li, Hailei Zhao, Xin Tao, Yaozong Yang, Jie Wang, Zhao Yang
Summary: In this study, a graphene-modified lithium silicate (LS) nanodots decorated SiOx-C material was prepared using a sol-gel approach and subsequent heat treatment. The material exhibited fast Li-ion and electron transport, enhancing the electrode reaction kinetics of SiOx. The highly-conductive network of graphene also mitigated the structural stress of SiOx, resulting in excellent structural durability. The electrode showed a reversible capacity of 400 mAh g-1 at 0.5 A g-1 for 200 cycles without obvious capacity degradation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xiaozhong Zhou, Zhaoyi Qi, Aixia Wang, Dongxu Liu, Kaifa Dong, Ziqiang Lei
Summary: SiOx is coated with a uniform Co-inlaid carbon coating using gum arabic as a carbon source. The resulting SiOx-Co@C electrode shows improved lithium-storage properties, making it a promising material for next-generation lithium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Hongshan Wei, Liyong Niu, Xiaohua Zhou, Yunru Zhang, Liwen Zhong, Yu Yang, Xiaoyuan Yu
Summary: Due to its high capacity and availability, silicon anode is a promising option for high-energy-density lithium-ion batteries. However, its volume expansion and low conductivity limit its practical applications. In this study, a SiOx/Si with good dispersion was synthesized and then coated with carbon to form a SiOx/Si/C composite. The optimized composite exhibited high specific capacity, excellent cyclability, and structural stability. This work provides a new idea for the design of future lithium-ion battery anode materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Luolan Wang, Jun Zhang, Zhenhui Wang, Wei Xiong, Shihan Yan, Zhiheng Gong, Nian Zhang, Shijun Zhao, Xinwei Wang, Yan Chen
Summary: This work presents an atomic-scale interfacial engineering strategy to construct highly-active electrocatalyst for glucose detection. Ni(OH)(2) nanosheets are decorated with an ultra-thin layer of Co9S8 using the atomic layer deposition (ALD) technique. After in-situ reconstruction, Ni@Co heterostructure consisting of Ni hydroxide nanosheets and CoOx clusters is obtained, which shows outstanding electrochemical glucose sensing performance. The presence of surface CoOx not only lowers the valence state of Ni, but also facilitates the deprotonation of Ni(OH)(2) to form NiOOH active species for glucose oxidation. The approach used in this work can be adapted to synthesizing high-performance electrocatalysts for other energy and environmental devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Jiye Li, Yuqing Zhang, Jialiang Wang, Huan Yang, Xiaoliang Zhou, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: Researchers successfully eliminated the defective interface in amorphous InGaZnO (a-IGZO) thin-film transistors by preoxidizing a-IGZO with nitrous oxide (N2O) plasma, achieving high performance and stability. This study is of great significance for addressing the interface reaction issue between high-k dielectrics and amorphous oxide semiconductors (AOSs) in next-generation thin-film transistors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Yuqing Zhang, Jiye Li, Jinxiong Li, Tengyan Huang, Yuhang Guan, Yuhan Zhang, Huan Yang, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: Here we present a self-aligned top gate (SATG) coplanar amorphous InGaZnO (a-IGZO) thin film transistor (TFT) technology with a down-scaled gate length (Lg) of 97 nm and a gate insulator (GI) AlOx of 4 nm (equivalent oxide thickness = 2.4 nm). The fabricated TFT exhibits excellent performance, including a large on-current (ION) of 17.9 mu A/mu m, a high on/off current ratio over 10^(9), a positive threshold voltage (V-TH) of 0.07 V, and a minimum drain-induced barrier lowering (DIBL) of 77 mV/V. These results are attributed to the abrupt homojunction at the source-drain sides and the high-quality ultrathin gate insulator of AlOx by atomic layer deposition (ALD). With the compatibility with modern integrated circuit (IC) process, the developed SATG a-IGZO TFT technology is suitable for back-end-of-line (BEOL) and 3D integrations of advanced ICs.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chenghao Jia, Xuepeng Xiang, Jun Zhang, Zuyun He, Zhiheng Gong, Huijun Chen, Nian Zhang, Xinwei Wang, Shijun Zhao, Yan Chen
Summary: In this study, it is demonstrated that the OER pathway can be effectively shifted by activating lattice oxygen, leading to strongly enhanced intrinsic activity. The OER performance of RP-phase cobaltite is significantly enhanced as Sr doping at the A site increases, which is attributed to the shift of the reaction pathway from AEM to LOM. Advanced spectroscopic techniques and density functional theory calculations reveal that the Sr dopant effectively facilitates oxygen ligand hole formation, charge transfer, and oxygen vacancy formation and migration, hence promoting lattice oxygen to participate in surface reactions. These results provide critical insight into the role of oxygen activity and offer a potential way for constructing highly active electrocatalysts.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Wengao Pan, Yunping Wang, Yanxin Wang, Zhihe Xia, Fion Sze Yan Yeung, Man Wong, Hoi Sing Kwok, Xinwei Wang, Shengdong Zhang, Lei Lu
Summary: In this work, the multiple effects of hydrogen (H) doping on amorphous InGaZnO (IGZO) TFTs were investigated. The H content influenced the electrical performances of the TFTs, acting as a defect suppressor, donor defect, transition state, and finally an acceptor defect. The oxygen vacancy (Vo) in IGZO determined the diffusion channel of the H dopant and its concentration. Additionally, fluorine (F) doping improved the hydrogen resistibility of IGZO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Zhenhui Wang, Yueyue Wang, Manyu Liu, Meili Xu, Zhixiang Jiang, Yuanhong Gao, Hong Meng, Xinwei Wang
Summary: Efficient charge transfer is achieved in narrowband organic photodiodes (OPDs) by adopting a self-assembly strategy to prepare donor/acceptor bulk heterojunctions as the photoactive layers. This method allows for the fabrication of highly smooth, phase-uniform, and low-defect-density thin films with controlled thickness. A narrowband near-infrared OPD centered at 760 nm with a full-width-at-half-maximum of around 60 nm, peak external quantum efficiency of 49%, and peak specific detectivity of over 10(13) Jones under -5 V is achieved.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yuqing Zhang, Jiye Li, Jinxiong Li, Tengyan Huang, Yuhang Guan, Yuhan Zhang, Huan Yang, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: This paper presents a capacitor-less embedded dynamic random access memory (eDRAM) technology based on oxide semiconductor (OS) transistors and demonstrates a self-aligned top-gate (SATG) amorphous InGaZnO (a-IGZO) thin-film transistor (TFT) using a simplified three-masks (3M) process. The performance of the TFT is improved by optimizing the gate insulator and interface defects, as well as manipulating the defects in the a-IGZO channel through a rapid thermal anneal. The developed TFTs show high device performance and minimal parasitic capacitances, enabling the realization of a high-performance and high-density monolithic-3D (M3D) integration.
ADVANCED ELECTRONIC MATERIALS
(2023)
Review
Engineering, Manufacturing
Jinxiong Li, Gaoda Chai, Xinwei Wang
Summary: Atomic layer deposition (ALD) has become an essential thin-film technology in the microelectronics industry due to its self-limited layer-by-layer growth feature and the ability to deposit conformal pinhole-free thin films with precise thickness control, especially on 3D structures. This review focuses on the surface chemistry and precursor chemistry aspects of ALD, providing a comprehensive understanding of the involved chemistry to further advance and utilize this technology. The surface chemistry of the gas-solid ALD reactions and the precursor chemistry used in ALD processes are discussed, along with emerging applications in microelectronics and future perspectives of the ALD technology.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Chemistry, Physical
Yuhang Guan, Yuqing Zhang, Jinxiong Li, Jiye Li, Yuhan Zhang, Zhenhui Wang, Yuancan Ding, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: In recent years, high-k gate dielectrics have received increasing attention in amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) due to the need for stronger gate controllability. This study developed an ultra-thin top-gate insulator of atomic-layer-deposited (ALD) HfOx for amorphous indium-gallium-zinc oxide (a-IGZO) TFTs. However, the reliability of the 4-nm HfOx-gated a-IGZO transistor is poor due to interface defects caused by the interface reaction between HfOx and a-IGZO during the ALD process. To improve stability, the a-IGZO channel is pre-treated with strong oxidizing plasma. However, further reducing HfOx thickness increases gate leakage current.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Laila Noureen, Shahid Zaman, Waqas Ali Shah, Qian Wang, Muhammad Humayun, Qiyong Xu, Xinwei Wang
Summary: A solar-powered steam generating system is developed for simultaneous water purification and steam sterilization. The system incorporates a three-layer photothermal membrane to produce high-temperature steam that can condense into clean water and efficiently sterilize microbes. The bifunctional device with high-temperature steam generation and solar-steam evaporation capability is significant for sustainable clean water generation and sterilization in remote areas.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Renbo Lei, Yupu Tang, Shihan Yan, Weitao Qiu, Zheng Guo, Xu Tian, Qian Wang, Kai Zhang, Shanshan Ju, Shihe Yang, Xinwei Wang
Summary: This study demonstrates that the plasma-assisted atomic layer deposition technique can effectively improve the photovoltaic performance of BiVO4 photoanodes by installing an ultrathin FeNi layer. This technique successfully addresses the fundamental limitations of BiVO4 photoanodes, leading to enhanced photon-to-current efficiency.
Article
Engineering, Environmental
Qian Wang, Tong Wang, Noureen Laila, Ke Huang, Xinwei Wang, Renbo Lei, Xinyue Bai, Qiyong Xu
Summary: This study presented the hydrothermal synthesis of a photocatalyst by coupling carbon dots (CDs) and bulk TiO2, which exhibited improved photocatalytic performance and bacterial-deactivation ability compared to traditional TiO2. It provides a promising strategy for leachate treatment.
Article
Engineering, Manufacturing
Xinwei Wang, Rong Chen, Shuhui Sun
Summary: Atomic scale engineering is becoming increasingly important in material manufacturing, and atomic layer deposition (ALD) technology offers unique properties for achieving atomic-scale material manufacturing controllability. This article discusses the applications, attributes, technology status, and challenges of ALD technology. It is envisioned that ALD technology will continue to make significant contributions to various industries and technologies in the coming years.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Chemistry, Multidisciplinary
Wei Qian, Weitao Qiu, Shanshan Yu, Duan Huang, Renbo Lei, Xianzhen Huang, Shuang Xiao, Xinwei Wang, Shihe Yang
Summary: The emergence of organic-inorganic hybrid perovskites has enabled the use of aerosol-liquid-solid technology for direct X-ray detectors. However, the film quality from this process is often compromised when deposited in ambient conditions with uncontrolled humidity. In this study, a solvent engineering strategy is developed to obtain high-quality perovskite thick films, minimizing the negative effect of the ambient conditions and improving the overall performance of the X-ray detectors.
Article
Engineering, Electrical & Electronic
Huaqing Huang, Linxin Guo, Yunbiao Zhao, Shengyuan Peng, Wenjun Ma, Xinwei Wang, Jianming Xue
Summary: This study reports a proton detector based on the methylammonium lead tribromide (MAPbBr3) perovskite single crystal, which demonstrates remarkable radiation tolerance. The detector can quantitatively monitor fluence rate and dose up to a high dose of 45 kGy with a low bias electric field. Furthermore, the detector exhibits a desirable self-healing characteristic, rapidly recovering its dark current after irradiation, enhancing its radiation tolerance. These findings suggest that the perovskite-based proton detector shows great promise for future applications in proton therapy, proton radiography, etc.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
