Article
Chemistry, Physical
Miao Chang, Fangyuan Cheng, Wen Zhang, Jia Xu, Yi Zhang, Tao Meng, Shixiong Sun, Yue Xu, Qing Li, Chun Fang, Jiantao Han, Yunhui Huang
Summary: Although nickel-rich layered lithium transition metal oxides are promising for high energy-density Li-ion batteries, they suffer from capacity fading and safety issues due to the unstable cathode-electrolyte interphase (CEI), especially at high voltage and temperature. A novel modification method is proposed to construct a protective antioxidant layer on the surface of LiNi0.8Co0.1Mn0.1O2 (NCM). This antioxidant layer scavenges free radicals and singlet oxygen, reducing interfacial side reactions, suppressing irreversible phase transitions, and improving stability. This modification strategy shows superior electrochemical performance and enhanced thermal stabilities, applicable to all layered transition metal oxide cathode materials.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Kanglong Guo, Chunlei Zhu, Huaping Wang, Shihan Qi, Junda Huang, Daxiong Wu, Jianmin Ma
Summary: Increasing the cut-off voltage of cathodes improves the energy density of Li||LiCoO2 batteries, but also leads to rapid battery degradation due to oxidation and deterioration. However, by using bis-(benzenesulfonyl)imide (BBSI) as an additive, a uniform and highly Li+ conductive cathode electrolyte interphase (CEI) is constructed, which stabilizes the batteries at 4.6 cut-off voltage and exhibits superior cycling and high-rate performance. The CEI, consisting of LiF and conductive Li+ moieties, improves Li+ migration, alleviates cathode degradation, and reduces other secondary degradation factors. Li||LiCoO2 batteries with 1% BBSI-containing electrolyte sustain 81.30% of initial capacity after 300 cycles at 0.5C, and 88.27% of initial capacity even after 500 cycles at 2C/3C.
ADVANCED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Min Li, Xianxian Zhou, Xiaotao Ma, Liang Chen, Ding Zhang, Shoudong Xu, Donghong Duan, Chengmeng Chen, Qinbo Yuan, Shibin Liu
Summary: The newly designed NG/CNTs-SO3- three-dimensional electrode effectively improves the performance of lithium-sulfur batteries by enhancing cycling stability and rate capability through the formation of a continuous ion-electronic conductive network and accelerating redox reaction kinetics.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Physical
Xin Cao, Yu Qiao, Min Jia, Ping He, Haoshen Zhou
Summary: This study reviews the potential application of Li-rich and Li-excess oxides as cathode materials for next-generation Li-ion batteries, discusses the challenges in using Li-excess oxides, and explores mechanisms to address these issues. Future research directions in the field are also proposed based on advanced characterizations and theory calculations.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yoo Jung Choi, You Jin Kim, Suji Kim, Ga Yoon Kim, Won-Hee Ryu
Summary: Layered cathode materials, such as LiCoO2, have been synthesized for Li-ion batteries using a direct solution-calcination strategy. The addition of polyvinylpyrrolidone (PVP) as a functional agent in the synthesis process helps to eliminate surface Li residues and promote a uniform particle distribution. The solution-calcined cathode material shows improved cycling stability and rate capability compared to commercial LCO, with suppressed phase transition. This research provides a simple and versatile method for the synthesis of cathode materials, avoiding complicated steps and the formation of unwanted residual lithium compounds.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Chenkun Li, Yao Xiao, Xiaosong Zhang, Hongwei Cheng, Ya-Jun Cheng, Yonggao Xia
Summary: This study presents a practical method to address the irreversible capacity loss of lithium-ion batteries during initial cycling by utilizing a Li2CO3/carbon nanocomposite as a lithium replenishment material. The nanocomposite, synthesized through high-speed ball-milling, exhibits high specific capacity and capacity retention in the initial charging cycle. By incorporating the nanocomposite in full-cells, the capacity and cycling life of the batteries are significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Meng Wang, Yongqiang Han, Mo Chu, Lin Chen, Meng Liu, Yijie Gu
Summary: The effects of cerium doping and the formation of layered-spinel hetero-structure on the electrochemical properties of lithium-rich cathode material were studied. Cerium doping and formation of spinel phase facilitated lithium ion diffusion and inhibited structural collapse during cycling, leading to improved cycling stability and rate capability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jie Liu, Jinping Zhang, Jie Zhu, Ruiqi Zhao, Yamin Zhang, Yanfeng Ma, Chenxi Li, Hongtao Zhang, Yongsheng Chen
Summary: A new lithium sulfonylimide covalent organic framework (COF) material was synthesized and used to modify the polypropylene (PP) separator of lithium-sulfur (Li-S) batteries. The modified separator showed higher ionic conductivity and lithium ion transference number, resulting in a high capacity and low decay rate for the Li-S battery.
Article
Chemistry, Multidisciplinary
Manman Wang, Kai Yang, Yuchen Ji, Xiaobin Liao, Guangpeng Zhang, Mateus G. Masteghin, Nianhua Peng, Filipe Richheimer, Huanxin Li, Jianan Wang, Xinhua Liu, Shichun Yang, Enrico Petrucco, Paul Shearing, Fernando A. Castro, S. Ravi P. Silva, Yan Zhao, Feng Pan, Yunlong Zhao
Summary: Researchers have developed a versatile on-chip electrochemical testing platform for catalyst screening and analysis of reaction products. Pt-based Li-CO2 batteries demonstrated low overpotential, and the reaction pathways were studied using in situ electrochemical Raman spectroscopy and atomic force microscopy. The platform enabled the fabrication of high-capacity, stable, and efficient Li-CO2 batteries.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Mohammad Amin Razmjoo Khollari, Mojtaba Khalili Azar, Mehdi Esmaeili, Naeim Malekpour, Seyed Morteza Hosseini-Hosseinabad, Roozbeh Siavash Moakhar, Abolghasem Dolati, Seeram Ramakrishna
Summary: Coating the NCM811 cathode material with TiO2 nanoparticles improves its structural stability, electrochemical performance, and safety at both room and high temperatures, leading to increased capacity retention and discharge capacity. Surface modification with TiO2 NPs is a practical and cost-effective method for enhancing the performance of the high energy density NCM811 cathode in commercial applications.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Changmei Jiao, Meng Wang, Bing Huang, Mengxia Zhang, Guodong Xu, Yuxin Liu, Yunfeng Zhao, Xuebu Hu
Summary: To enhance the electrochemical performance and structural stability of Li1.2Mn0.54Ni0.13Co0.13O2, Li3PO4 surface modification and single crystallization are utilized. The results of electrochemical characterization indicate that the single crystal cathode material modified with Li3PO4 has excellent cycle stability and Li+ diffusion coefficient. Li-ion conductor Li3PO4 provides diffusion channels for Li+ migration and inhibits phase transition. Coating Li3PO4 on Li-rich cathode materials is an effective approach to improve their electrochemical performance and structure stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yong Wang, Yiyu Wu, Peiyuan Mao, Yunmiao Fan, Xi Wang, Hongyu Xiang, Zhongfeng Li, Kai Li, Chaoquan Hu
Summary: This study demonstrates the use of modified montmorillonite as a separator film to enhance the performance of Li-S batteries. The modified film effectively retards the shuttle effect and improves the rate capability and cycling stability of Li-S batteries. The results show that the modified Li-S batteries exhibit higher energy density and cycling stability under different cycling conditions.
Article
Chemistry, Physical
Wenwen Deng, Weibo Shi, Peiyuan Li, Naiqi Hu, Shuchan Wang, Jiayao Wang, Liang Liu, Zhuanzhuan Shi, Jian Lin, Chunxian Guo
Summary: All-organic lithium-ion batteries (AOLBs) are sustainable, versatile, and potentially low-cost energy storage devices. However, their development is limited by the performance and stability of the Li-contained organic cathodes. This study introduces LiTCNQ as a new cathode material for AOLBs and demonstrates its air-stable nature and high performance.
ENERGY STORAGE MATERIALS
(2022)
Review
Electrochemistry
Huaming Qian, Haoqi Ren, Ying Zhang, Xianfeng He, Wenbin Li, Jingjing Wang, Junhua Hu, Hong Yang, Hirbod Maleki Kheimeh Sari, Yu Chen, Xifei Li
Summary: This review article provides a detailed overview of the recent progress in surface doping and bulk doping strategies for cathode materials in lithium-ion batteries. It discusses their effects on the structural stability, ion diffusion, and electrochemical properties of the materials. Furthermore, the article highlights the correlation between hybrid surface engineering strategies (doping and coating) and their impact on electrode performance, and identifies existing challenges and future prospects in this field.
ELECTROCHEMICAL ENERGY REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Chunmao Huang, Shenghong Liu, Yang Wang, Jingjie Feng, Yanming Zhao
Summary: NaVMoO6 with brannerite-type structure was successfully synthesized using a sol-gel method, and utilized as a cathode material for lithium ion batteries for the first time. The material showed stable reversible specific capacity, indicating its potential as a cathode material for LIBs and enriching the possibilities of molybdenum-based materials for this application.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Organic
Yang Fan, Wei Ou, Mengyin Chen, Yubing Liu, Bing Zhang, Wenqing Ruan, Chenliang Su
Summary: Environmentally friendly and highly efficient synthesis of alpha-deuterated amines is achieved via a concise electrochemical process using D2O as deuterium source without any external reductants or catalysts. Various imines are compatible, affording the desired products in high yields and D-incorporation. Gram-scale synthesis and flow-cell electrochemistry technology are used to synthesize deuterated pharmaceutical amines and their intermediates. Mechanistic studies reveal a plausible process, including the formation of carbanion species followed by deuterium atom transfer.
Article
Materials Science, Multidisciplinary
Ibrahim Abdelwahab, Benjamin Tilmann, Xiaoxu Zhao, Ivan Verzhbitskiy, Rodrigo Berte, Goki Eda, William L. Wilson, Gustavo Grinblat, Leonardo de S. Menezes, Kian Ping Loh, Stefan A. Maier
Summary: Parametric infrared upconversion is a nonlinear optical process that converts low-frequency IR photons into high-frequency ultraviolet/visible photons. It is of great importance for various applications, such as security, material science, and healthcare. However, the upconversion efficiency for nanometer-scale materials is typically very low due to limited depth of excitation fields.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiteng Gu, Yan Liu, Nannan Meng, Vicknesh Sahmuganathan, Sze Chieh Tan, John Sudijono, Jiecong Tang, Eswaranand Venkatasubramanian, Abhijit Mallick, Febiana Tjiptoharson, Soroosh Daqiqeh Rezaei, Siew Lang Teo, Qiang Zhu, Yunjie Chen, Ming Lin, Zhaogang Dong, Kian Ping Loh
Summary: A dielectric metasurface-based structural color constructed on nanocrystalline diamond film is demonstrated, showing excellent color performance with high brightness and a relatively wide gamut. This work presents the first evidence that nanocrystalline diamond can serve as a robust and highly tunable dielectric platform for information encryption.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Xiao Wu, Xiangyu Zhang, Wei Yu, Yongxiang Zhou, Walter Wong, Weixin He, Kian Ping Loh, Xiao-Fang Jiang, Qing-Hua Xu
Summary: The all-inorganic layered halide perovskite CsPb2Br5 shows potential applications due to its optical properties and stability, but the mechanism of its photoluminescence remains controversial. The optical properties of CsPb2Br5 depend on sample quality and preparation method. High-quality single crystals of CsPb2Br5 were prepared using a crystallization method, and they showed a conversion into efficient green emitters with a significant enhancement in emission intensity through thermal annealing or irradiation. A mechanism involving thermally induced indirect-to-direct bandgap transition associated with defect formation was proposed based on comprehensive characterization studies and theoretical calculations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Physical
Fei Cao, Dejian Yu, Mykola Telychko, Jiong Lu, Peiyuan Pang, Chenliang Su, Guichuan Xing
Summary: This article provides a comprehensive overview of the crystallographic structures, exciton transport mechanisms, and diverse energy conversion properties of 2D halide perovskites. The challenges and opportunities for better understanding and manipulating the exciton dynamics of this promising class of materials are also discussed.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chaofei Liu, Xiuying Zhang, Xinyun Wang, Ziying Wang, Ibrahim Abdelwahab, Ivan Verzhbitskiy, Yan Shao, Goki Eda, Wanxin Sun, Lei Shen, Kian Ping Loh
Summary: A systematic study of the ferroelectric properties in 2D materials NbOX2 (X = Cl, I) reveals that NbOCl2 exhibits stronger ferroelectricity than NbOI2. The presence of 1D collinear ferroelectric strips is observed in NbOCl2. Scanning tunneling microscopy (STM) imaging provides insights into the unreconstructed atomic structures of NbOX2 surfaces, while scanning tunneling spectroscopy probes the electronic states induced at defect (vacancy) sites.
Article
Chemistry, Multidisciplinary
Shuai Lu, Darien J. Morrow, Zhikai Li, Chenxing Guo, Xiujun Yu, Heng Wang, Jonathan D. Schultz, James P. O'Connor, Na Jin, Fang Fang, Wu Wang, Ran Cui, Ou Chen, Chenliang Su, Michael R. Wasielewski, Xuedan Ma, Xiaopeng Li
Summary: In the field of supramolecular chemistry, host-guest systems have been widely used to encapsulate various substrates, but their application is limited to small molecules. This study presents a water-soluble metallo-supramolecular hexagonal prism with a large hydrophobic cavity by attaching multiple polyethylene glycol chains to the building blocks. The assembled prisms can encapsulate quantum dots with diameters below 5.0 nm. Furthermore, the supramolecular cage surrounding each quantum dot effectively modifies their photophysics by increasing the rates of relaxation processes. This work expands the substrate scope in host-guest systems and provides a new approach to tune the optical properties of quantum dots.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Materials Science, Multidisciplinary
Xuelian Wu, Hui Ling Tan, Chaohua Zhang, Zhenyuan Teng, Zailun Liu, Yun Hau Ng, Qitao Zhang, Chenliang Su
Summary: Bi-based layered materials have great potential in constructing ultrathin 2D structures, which improve the photocatalytic performance of semiconductors. The 2D configuration of Bi-based photocatalysts offers advantages like large surface area, short charge migration distance, and abundant reactive sites. This review focuses on the synthesis techniques and properties of 2D Bi-based photocatalysts, as well as their potential applications in various photocatalytic reactions. Strategies for enhancing solar energy conversion efficiency on ultrathin Bi-based photocatalysts are also discussed.
PROGRESS IN MATERIALS SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Clement Kok Yong Tan, Wei Fu, Kian Ping Loh
Summary: Two-dimensional indium(III) selenide (In2Se3) with rich polymorphism shows potential in overcoming depolarization effects in traditional ferroelectrics. α-In2Se3 has attracted attention as a ferroelectric semiconductor at the monolayer level, making it suitable for high-density memory switching modes. However, difficulties in phase identification due to mixing with β-In2Se3 hinder α-In2Se3 studies. Understanding polymorph transitions and crystal-amorphous phase transitions in β-In2Se3 is important for its application in resistive memory storage. This review discusses the differentiation of In2Se3 polymorphs and polytypes and highlights recent applications in ferroelectrics and memory devices.
Article
Chemistry, Multidisciplinary
Jing-Yi Song, Xu Chen, Yu-Mei Wang, Xiao Luo, Tian-E. Zhang, Guo-Hong Ning, Dan Li
Summary: In this study, copper catalysts based on covalent metal-organic frameworks were prepared and showed high catalytic activity and reusability, with good substrate compatibility for the cycloaddition reaction of CO2.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Rong-Jia Wei, Mo Xie, Ri-Qin Xia, Jun Chen, Hua-Juan Hu, Guo-Hong Ning, Dan Li
Summary: This article presents a method for the rapid and scalable construction of Au-MOFs at ambient conditions, demonstrating their high chemical stability under alkaline conditions and good performance as heterogeneous catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Walter P. D. Wong, Xinyun Wang, Rongrong Zhang, Kian Ping Loh
Summary: Hybrid organic-inorganic perovskites (HOIPs) have diverse functionalities such as chirality, ferroelectricity, and photovoltaics. This study focuses on a new family of layered HOIPs called diammonium-halide-diammonium (DHD) perovskites, which have an organic 'spacer' layer. The synthesis of lead-free double perovskite systems using DHD perovskites is also presented, with a discussion on the chemical and structural design considerations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Zhongxin Chen, Jia Liu, Kian Ping Loh
Summary: The article introduces the application of single-atom catalysts in the flow synthesis of fine chemicals. The researchers discuss the reaction mechanism of SAC-catalyzed processes and the advantages of SACs in drug preparation. They also emphasize the importance of continuous-flow techniques in improving productivity and simplifying process transfer. Additionally, the article identifies technical barriers in SAC research and offers perspectives on standardized and scalable protocols for mass production.
ACCOUNTS OF MATERIALS RESEARCH
(2023)
