Article
Chemistry, Physical
Zoey Huey, Yeyoung Ha, Sarah Frisco, Andrew Norman, Glenn Teeter, Chun-Sheng Jiang, Steven C. DeCaluwe
Summary: In this study, the SEI on composite Si-Gr anodes was characterized using multi-modal characterization techniques to reveal the relationship between SEI chemical composition and structure with its functional properties. By combining multiple analysis methods, a comprehensive understanding of the SEI was obtained. The study found that the SEI has a bilayer structure and a direct correlation between elemental Li and F, suggesting that most Li in the SEI exists as lithium fluoride (LiF). Furthermore, there is an inverse relationship between lithium carbonate and LiF concentration in the SEI, providing insight into the detailed chemistry of SEI formation and evolution.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yuan Gao, Chuan Xie, Zijian Zheng
Summary: The increasing demand for portable and wearable electronics has led to a growing interest in flexible lithium-ion batteries and supercapacitors. Textile composite electrodes have shown great promise for flexible, high-capacity, and long-cycle-life textile-based electrochemical energy storage devices, compared to traditional metal-foil-supported electrodes. Challenges associated with textile composite electrodes and textile-based electrochemical energy storage devices are discussed, along with potential solutions.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Youngjin Kim, Hanseul Kim, Woochul Shin, Eunmi Jo, Arumugam Manthiram
Summary: To reduce cost and increase energy density, it is important to remove cobalt and increase nickel content in practical LiNi1-x-yMnxCoyO2 (NMC) and LiNi1-x-yCoxAlyO2 (NCA) cathodes. However, the use of cobalt-free, high-nickel layered oxide cathodes in lithium-ion batteries (LIBs) is hindered by their high reactivity with the electrolyte and microcrack formation. In this study, the key parameters for microstructural engineering in cobalt-free LiNiO2 (LNO) with boron (B) and aluminum (Al) dopants are comprehensively investigated. The results show that boron-doping (B-LNO) is the most effective dopant strategy for improving the cycle life of cobalt-free LIBs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yangtao Liu, Xiangtao Gong, Chinmoy Podder, Fan Wang, Zeyuan Li, Jianzhao Liu, Jinzhao Fu, Xiaotu Ma, Panawan Vanaphuti, Rui Wang, Andrew Hitt, Yavuz Savsatli, Zhenzhen Yang, Mingyuan Ge, Wah-Keat Lee, Bryan Yonemoto, Ming Tang, Heng Pan, Yan Wang
Summary: In response to the demand for LIBs, a solvent-free manufacturing technology is demonstrated to avoid toxic organic solvents and improve electrode structures. The dry-printed (DP) electrodes have lower tortuosity, allowing for better rate performance and higher capacity retention compared to slurry cast (SL) electrodes. The coating layer on active materials in DP cells prevents side reactions and prolongs cycle life. This roll-to-roll manufacturing process has immense potential for scalable and efficient battery production.
Article
Electrochemistry
Ralph Nicolai Nasara, Wen Ma, Shota Tsujimoto, Yuta Inoue, Yuko Yokoyama, Yasuyuki Kondo, Kohei Miyazaki, Yuto Miyahara, Tomokazu Fukutsuka, Shih-kang Lin, Takeshi Abe
Summary: By coating a thin-film Li4Ti5O12 layer on a hard carbon ideal model electrode, this study successfully improved the performance and stability of hard carbon powder, reduced initial reversible capacity loss, and enhanced impedance stability.
ELECTROCHIMICA ACTA
(2021)
Article
Energy & Fuels
Jinhai Liu, Zhengyu Chu, Haili Li, Dongsheng Ren, Yuejiu Zheng, Languang Lu, Xuebing Han, Minggao Ouyang
Summary: A fast charging strategy for large-capacity lithium batteries was proposed, achieving twice the charging speed and reducing lithium deposition, with decay rate similar to that of a battery subjected to slow charging after 100 cycles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Weilong Ai, Niall Kirkaldy, Yang Jiang, Gregory Offer, Huizhi Wang, Billy Wu
Summary: In this study, an electrochemical composite electrode model was developed and validated for lithium-ion batteries with a silicon/graphite anode. The model was able to reproduce voltage hysteresis and demonstrate the interactions between graphite and silicon. This research revealed the effects of silicon additives and the impact of different composite electrodes on the performance of lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2022)
Review
Chemistry, Physical
Xingwen Yu, Arumugam Manthiram
Summary: All-solid-state lithium batteries are gaining attention, with solid polymer electrolytes and solid ceramic electrolytes as two major research categories. Solid composite electrolytes that combine the advantages of these materials can greatly enhance battery performance compared to using polymer or ceramic electrolytes alone.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ayaulym Belgibayeva, Makpal Rakhatkyzy, Aiym Rakhmetova, Gulnur Kalimuldina, Arailym Nurpeissova, Zhumabay Bakenov
Summary: Free-standing tin phosphide/phosphate carbon composite nanofiber mats with unique nanostructure were successfully synthesized by electrospinning and partially reducing the phosphate-containing precursors. The Sn:P molar ratio in the precursor solution was found to have an unusual effect on the structure and physical-electrochemical properties of the material. The prepared material exhibited excellent performance as an anode material for lithium-ion batteries, with high charge capacity, good Coulombic efficiency, and stable cyclability under various conditions.
Article
Chemistry, Multidisciplinary
Jiang Cui, Hongkui Zheng, Kai He
Summary: Conversion-type materials are being explored as potential high-energy-density alternatives for rechargeable ion batteries, with in situ TEM being extensively employed to provide mechanistic insights into the behavior of battery materials. This review comprehensively summarizes recent developments in in situ TEM techniques for investigating dynamic phase transformation and associated structural, morphological, and chemical evolutions during conversion reactions with alkali ions in secondary batteries, with a special emphasis on spinel metal oxides and 2D metal chalcogenides. Unique scientific findings obtained through in situ TEM are highlighted, addressing fundamental questions and practical issues related to phase transformation, structural evolution, electrochemical redox, reaction mechanism, kinetics, and degradation.
ADVANCED MATERIALS
(2021)
Review
Polymer Science
Yun Zhao, Jianhua Yan, Jianyong Yu, Bin Ding
Summary: This review elaborates on the principles and advantages of electrospinning technology, comprehensively summarizes previous studies on high-performance nanofibrous electrode materials prepared by electrospinning, and discusses the correlation between 1D nanostructured materials and electrode performances. The remaining challenges of nanofibrous electrodes are proposed, and future research directions in this area are pointed out.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xingyu Pan, Xingbao Zhu, Jin Qin, Yuanguo Wu, Weihua Wan, Ting Chen, Yu Wang, Zining Man, Zhe Lu
Summary: A new type of perovskite oxide, PBCO, was synthesized and optimized by cooperating with carbon nanotubes or carbon nanoparticles, showing improved discharge capacity and stability when used as a catalyst in Li-O-2 batteries. The addition of carbon materials reduced charge transfer resistance and significantly enhanced cathodic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Energy & Fuels
Susmi Anna Thomas
Summary: This article provides a review of the potential applications of black phosphorous (BP) in rechargeable batteries. It discusses the unique properties of BP compared to other 2D materials and explores various synthesis methods. The article also examines the application of BP in different types of rechargeable batteries and emphasizes the preparation of BP-based hybrid electrodes. The advantages of BP-based hybrid electrodes, such as high specific capacity and long cycle life, highlight their potential use in next-generation rechargeable batteries.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Han-Min Kim, Byeong-Il Yoo, Jin-Woo Yi, Min-Jae Choi, Jung-Keun Yoo
Summary: The rapid development of electric vehicles has created a need for high energy density lithium-ion batteries. Increasing the thickness of electrodes is an effective way to enhance the energy density, but the traditional wet process has limitations. In this study, we introduce a dry, solvent-free process using a phenoxy resin binder, which produces homogeneous thick electrodes with improved electrochemical stability.
Article
Electrochemistry
Hiroshi Nagata, Junji Akimoto
Summary: This study reports an effective one-step preparation process for high-performance positive and negative composite electrodes in all-solid-state lithium sulfur batteries, which accelerates the generation of solid electrolyte and the compounding of electrode active materials. The high specific surface area of carbon boosts the charge-discharge performances of both the Li2S positive and Si-negative composite electrodes. A full-battery cell achieved high area capacity and energy density using these composite electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Cardiac & Cardiovascular Systems
Fushun Lin, Qian Wang, Lingwei Meng, Yongfeng Liang, Xiangjin Kong, Kaiming Wei, Qiuwang Zhang, Xinghua Gu
Summary: This study comprehensively assessed the anatomy and geometry of the mitral annulus, coronary sinus, and left circumflex artery in patients with mitral regurgitation using three-dimensional reconstruction of cardiac CT images. The results showed that patients with mitral regurgitation had a larger mitral annulus perimeter index, increased coronary sinus diameters, and greater posterior mitral annulus radian. The distances between the coronary sinus and mitral annulus were significantly different among the groups. Patients with mitral regurgitation had a smaller coronary sinus-mitral annulus plane angle during systole. The findings of this study are important for improving the results of transcatheter mitral annuloplasty and enhancing device design.
INTERNATIONAL JOURNAL OF CARDIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhichao Guo, Yongfeng Liang, Jun Cao, Tielong Sun, Xuan Liu, Jilai Xue, Junpin Lin
Summary: In this study, Al matrix composites reinforced with yttrium oxyfluoride (YOF) and TiB2 were successfully fabricated by molten-salt-assisted stirring casting. YOF particles exhibited better distribution in the aluminum matrix and showed better bonding strength with the matrix compared to TiB2. The Al-YOF composite demonstrated higher hardness, tensile strength, and ductility than the Al-TiB2 composite, indicating the potential of YOF in enhancing the performance of Al matrix composites.
Article
Materials Science, Ceramics
Shengliang Xie, Hui Yu, Liangguang Liu, Jianlin Li
Summary: Lead glaze with excellent radiation shielding ability can effectively prevent radiation leakage by using lead glazed indoor titles in buildings. However, the low firing temperature of lead glaze is associated with poor wear resistance. In this study, super-hard cBN particles are introduced into the soft glass matrix to improve mechanical properties. Results show that with 5 wt% cBN particles embedded in the glass matrix, the hardness increases by 51.2% and the wear resistance significantly improves.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Jaswinder Sharma, Georgios Polizos, Marm Dixit, Charl J. Jafta, David A. Cullen, Yaocai Bai, Xiang Lyu, Jianlin Li, Ilias Belharouak
Summary: Lithium-ion battery cathode materials often suffer from degradation issues, which can harm their overall performance. Oxide coatings have been proven to be effective in improving electrochemical performance, however, current coating methods are not efficient and can be costly. In this article, a low-cost and scalable strategy for applying oxide coatings on cathode materials is discussed, showing enhancement in the performance of aqueously processed cathodes in cells. This strategy shows potential in improving the performance of aqueously processed Li-ion cells.
Article
Nanoscience & Nanotechnology
Tielong Sun, Yongfeng Liang, Gang Yang, Zhichao Guo, Jun Cao, Yanxun Mu, Junpin Lin
Summary: The tensile properties and deformation behavior of a TNM-based alloy microalloyed with W, C, and Y were systematically investigated. The addition of trace microalloying elements significantly refined the microstructure and improved the strength and ductility of the alloy. High-density dislocations, deformation twins, and twin intersections were observed near the tensile fracture, and dislocation dissociation promoted the formation of deformation twins. The twin intersection hindered dislocation movement and relieved stress concentration, enhancing the tensile performance of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
X. Lyu, T. Zhang, Z. Li, C. J. Jafta, A. Serov, I. -H. Hwang, C. Sun, D. A. Cullen, J. Li, J. Wu
Summary: This study investigates the effect of trace Cu loading on metal-free catalysts for CO/CO2 reduction reactions (CORR). It is found that increasing Cu loading switches the selectivity from C1 (CH4) to C2 products in CORR. At a Cu loading of 2.5 mu g/cm2, the Faradaic efficiency of CH4 in CORR decreased from 62% to 52% for C2 products. Further increasing the atomic Cu loading to 3.8 mu g/cm2 promotes the Faradaic efficiency of C2 products to 78%. CO2RR requires higher Cu loading than CORR to switch the selectivity from C1 to C2 products. This study clarifies the distinct impact of trace Cu on the activity/selectivity between CORR and CO2RR.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Runming Tao, Susheng Tan, Harry M. Meyer III, Xiao-Guang Sun, Bryan Steinhoff, Kahla Sardo, Amer Bishtawi, Tillman Gibbs, Jianlin Li
Summary: Dry processing is a promising method for high-performance and low-cost lithium-ion battery manufacturing which uses polytetrafluoroethylene (PTFE) as a binder. The electrochemical stability of PTFE binder in the cathodes and the chemistry of the cathode electrolyte interphase (CEI) layers are studied by cycling the high-loading dry-processed electrodes in electrolytes with LiPF6 or LiClO4 salt. The detection of LiF confirms that PTFE undergoes side reactions in the cathodes, and the thickness of the CEI layer is found to be much thicker when LiPF6 is used as the electrolyte salt compared to LiClO4.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Xiang Lyu, Dimitra Anastasiadou, Jithu Raj, Jingjie Wu, Yaocai Bai, Jianlin Li, David A. Cullen, Jun Yang, Liliana P. L. Gonsalves, Oleg I. Lebedev, Yury V. Kolen'ko, Marta Costa Figueiredo, Alexey Serov
Summary: A facile approach for synthesizing M-N-C catalysts (M = Co, Fe, Ni) without organic solvents at a commercial scale is reported. Single atomic catalysts with high surface areas were successfully obtained. Among the synthesized catalysts, Ni-N-C exhibited the highest performance in the electrochemical CO2 reduction reaction, with 80% Faradaic efficiency of CO production at -0.49 VRHE and a turnover frequency of 57,379 h-1. The large-scale synthesis and high performance of M-N-C catalysts enable their practical implementation in industrially relevant CO2RR.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Yingchao Guo, Yongfeng Liang, Junpin Lin
Summary: An in-situ dual morphology carbide and boride reinforced Ti-47.7Al-7.1Nb-2.3 V-1.1Cr (at%) alloys were fabricated with nano-B4C addition by spark plasma sintering (SPS). The addition of 0.2 at% nano-B4C significantly refined the lamellar colony size from 126 +/- 45 μm to 45 +/- 15 μm and improved the ultimate tensile strength (UTS) by 105 MPa. The improvement in tensile property is attributed to the multiple strengthening induced by Ti2AlC micron/nanoparticles and TiB2 nanoparticles.
Article
Materials Science, Multidisciplinary
Hui Xue, Chang Liu, Yi Song, Yongfeng Liang, Xinhuan Tong, Yanli Wang, Junpin Lin
Summary: The microstructure instability of high Nb-TiAl alloy at high temperature severely limits its use in complex environments. Refractory metal W nanoparticles can effectively stabilize the microstructure due to their high melting point. Additive manufacturing technology can further refine the microstructure. In this study, the flow of melt during selective laser melting (SLM) process is simulated, and it is found that the scanning speed affects the melt flow behavior. By using SLM to prepare nano-W composite TiAl alloys, higher scanning speeds result in more uniform dispersion of nano-W particles. The nano-W particles act as heterogeneous nucleation sites and inhibit the growth of columnar grains, leading to the formation of randomly oriented equiaxed grains microstructure.
Article
Nanoscience & Nanotechnology
Jun Cao, Tielong Sun, Zhichao Guo, Gang Yang, Yongfeng Liang, Junpin Lin
Summary: This study demonstrates that trace carbon alloying can significantly improve the room-temperature mechanical properties of a cast Ti-46Al-6Nb alloy. By improving multiple factors simultaneously, this research offers an accurate and feasible strategy for utilizing interstitial carbon to solid-solution strengthen TiAl alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Jun Cao, Zhichao Guo, Tielong Sun, Yingchao Guo, Yongfeng Liang, Junpin Lin
Summary: The study found that HIP and HT can improve the mechanical properties of TiAl alloys by adjusting the microstructure and phase composition, thereby enhancing its strength and plasticity. Changes in interlamellar spacing, phase content, and lamellae thickness during HIP and HT processes have significant effects on the alloy's mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Chemistry, Physical
Han Liu, Xianfei Ding, Xiao Zong, Hong Huang, Hai Nan, Yongfeng Liang, Junpin Lin
Summary: By using directional solidification technology, the plasticity and strength of TiAl alloy at room temperature and high temperatures can be effectively improved. However, ensuring the lamellar orientation is parallel to the growth direction poses various difficulties. This paper reviews two fundamental thoughts for lamellar orientation control: using seed crystals and controlling the solidification path. Multiple specific methods and their progress are introduced, and the advantages and disadvantages of different methods are analyzed. Novel ways of controlling the lamellar orientation and future development are also discussed.
Article
Chemistry, Multidisciplinary
Georgios Polizos, Sergiy Kalnaus, Xi Chelsea Chen, Marm Dixit, Mahalingam Balasubramanian, Jaswinder Sharma, Runming Tao, Jianlin Li
Summary: This study developed structured cathodes for solid state batteries using a freeze tape casting technique. The double-layer configuration with a dense bottom layer for energy density and a porous top layer for power density improved the battery performance. The structured cathodes exhibited higher capacity values and better Coulombic efficiency.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Environmental
Xiang Lyu, Yaocai Bai, Jianlin Li, Runming Tao, Jun Yang, Alexey Serov
Summary: This study evaluated two commercially available stainless steel mesh substrates (316 SS and 304 SS) as electrodes for oxygen evolution reaction (OER) in natural seawater electrolysis. The results show that 304 SS is less stable against corrosion under neutral and low alkaline seawater electrolytes due to metal dissolution and chlorine evolution reaction (CER), while 316 SS outperforms 304 SS in terms of electrocatalytic activity and corrosion resistance. The performance of 304 SS is comparable to 316 SS under high alkaline seawater electrolyte, where CER and metal dissolution are suppressed by OER.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
