Article
Materials Science, Ceramics
Suliang Deng, Jing Luo, Gaolei Zhao, Bingxin Huang
Summary: As promising cathode material for sodium-ion batteries, P2-Na0.67Ni0.33Mn0.67O2 exhibits high capacity and high working voltage. However, its electrochemical performances deteriorate rapidly during cycling, which limits its application. In this study, the cycling stability of P2-Na0.67Ni0.33Mn0.67O2 is improved through Co doping and Al1.8Co0.2O3 surface coating. Co doping enhances the cycling stability and rate capability, but reduces the initial capacity. Moreover, the Al1.8Co0.2O3 coating improves the cycle stability with a decreased capacity, showing a retention rate of 84.8% after 100 cycles.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Sunwook Kim, Kyoungmin Min, Kwangjin Park
Summary: Y-doping improved the rate capability and cycle retention of P2-type Na0.67Ni0.33Mn0.67O2 cathode material, resulting in a more stable structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Hyeongwoo Kim, Jae-Ho Park, Sung-Chul Kim, Dongjin Byun, Kyung Yoon Chung, Hyung-Seok Kim, Wonchang Choi
Summary: P2-type NaNiMnO2 (NNMO) is a high-energy and high-voltage cathode material in sodium-ion batteries, but surface degradation effects limit its electrochemical stability. By applying Mg1-xNixO (MgNiO) as a coating, cycling stability and rate capability of NNMO can be significantly improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Pengfei Zhou, Jing Zhang, Zhennan Che, Zuhao Quan, Ju Duan, Xiaozhong Wu, Junying Weng, Jinping Zhao, Jin Zhou
Summary: By employing a co-doping strategy of Ti4+/F-, the electrochemical properties of P2-Na0.67Ni0.33Mn0.67O2 cathode material for sodium-ion batteries were improved, leading to enhanced cycling stability and high-rate capability.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jie Feng, Shao-hua Luo, Jiachen Wang, Pengwei Li, Shengxue Yan, Junzhe Li, Peng-qing Hou, Qing Wang, Yahui Zhang, Xin Liu
Summary: In this study, a novel cobalt-free layered P2-type Na0.67Ni0.33Mn0.67O2 cathode material was designed and synthesized. The effect of Mg doping on the electrochemical performance and structural stability of the material was investigated, and it was found that Mg ion doping can effectively improve the electrochemical performance and structural stability of the material.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Guohua Zhang, Jiayi Li, Yuxin Fan, Yukun Liu, Ping Zhang, Xinyue Shi, Jiwei Ma, Renyuan Zhang, Yunhui Huang
Summary: P2-type Fe/Mn-based layered oxide cathode has attracted significant attention for its low cost, low toxicity, earth abundance, and high theoretical capacity in sodium-ion battery applications. However, the harmful P2-P2' phase transition associated with the Jahn-Teller effect of Mn3+ during the discharge process limits its cycling stability. In this study, Al-doping is proposed as an effective strategy to suppress the phase transition and improve the cycling stability and rate capability of the electrode.
ENERGY STORAGE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Siqi Yuan, Jizhen Qi, Meidan Jiang, Guijia Cui, Xiao-Zhen Liao, Xi Liu, Guoqiang Tan, Wen Wen, Yu-Shi He, Zi-Feng Ma
Summary: In this study, the combination of slight Sn substitution and PPy coating on Na0.67Ni0.33Mn0.63Sn0.04O2@PPy (3.3 wt %) composite material showed excellent cycling stability, indicating a promising approach for achieving superior cycling stability for high-voltage layered transition metal oxides.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Ashmitha Anilkumar, Neeraja Nair, Shantikumar Nair, Senthilkumar Baskar
Summary: P2 and O3-type sodium layered oxides (NaxTMO2) are considered as the most promising cathodes for sodium-ion batteries. The P2-type oxides outperform O3 in terms of fast sodium diffusion and high-rate kinetics. The P2-structure, however, has a low initial charge capacity due to sodium deficiency, which limits its practical application. In addition, P2-O2 phase transition and Na+/vacancy ordering degrade the cycling performance. Dual doping strategy, such as Li-Cu dual doping, can mitigate these issues and improve the performance of P2-type cathodes.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Jiameng Feng, De Fang, Zhe Yang, Jianjian Zhong, Chaoliang Zheng, Zhicheng Wei, Jianling Li
Summary: In this work, a series of Fe-doped P2/O3-type layered oxides were successfully synthesized and characterized by XRD. The collaboration of two phases was found to exhibit superior electrochemical performance with high capacity and good capacity retention. The occurrence of residual salt on the surface was greatly reduced in the two-phase structure, leading to improved efficiency. This novel composite phase strategy has potential for the design of promising cathode materials for sodium-ion batteries and other alkali metal batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Cheng Cheng Fu, Juan Wang, Yong Li, Guoliang Liu, Teng Deng
Summary: The sodium-ion battery material with cobalt doping shows superior electrochemical performance by improving the Mn4+ ratio, exhibiting excellent rate performance and cycle stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Haixia Ren, Yu Li, Qiaojun Li, Kun Zhang, Yang Zhao, Chuan Wu, Ying Bai
Summary: By using a multifunctional framework, which combines surface coating of NaTi2(PO4)3 (NTP) and bulk Ti4+ doping, the performance of P2-Na0.8Li0.12Ni0.22Mn0.66O2 (NLNM@NTP) is improved, leading to the development of high energy density sodium-ion batteries.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Gaoqin Su, Lijiang Li, Zhe Shi, Xiaobo Ma, Ling Ma, Zhijie Cao
Summary: In this study, a new Li-doped P2-Na0.8Li0.15-Cu0.1Mn0.75O2 cathode material was designed, and the electrochemical performances of both materials were systematically investigated. The doped sample showed higher reversible capacity, better rate capability, and stronger cycling stability compared to the undoped sample. These improvements are believed to result from the positive effect of Li on triggering anionic redox and facilitating ion and electron diffusion during the sodiation/desodiation process.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Pengfei Zhou, Zhennan Che, Fanteng Ma, Jing Zhang, Junying Weng, Xiaozhong Wu, Zhichao Miao, Hongtao Lin, Jin Zhou, Shuping Zhuo
Summary: Composition designing and structure engineering were combined to design and synthesize a novel Ni2+/Cu2+/Mg2+ co-doped P2-NaMNCuMg with 3D hierarchical structure, which showed good water/air stability, high reversible capacity, and prolonged cycling stability. The P2-NaMNCuMg cathode demonstrated promising potential as a high-performance cathode for high-voltage SIBs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Liangtao Yang, Liang-Yin Kuo, Juan Miguel Lopez del Amo, Prasant Kumar Nayak, Katherine A. Mazzio, Sebastian Maletti, Daria Mikhailova, Lars Giebeler, Payam Kaghazchi, Teofilo Rojo, Philipp Adelhelm
Summary: The partial substitution of transition metals with Li in the P2-Na0.67Mn0.6Ni0.2Li0.2O2 electrode enhances the stability of the material, leading to a solid-solution type storage mechanism and excellent cycle life. In contrast, compositions without Li exhibit phase transitions and a stair-case voltage profile.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Pritamkumar V. Shinde, Dimple P. Dutta
Summary: This study aims to improve the electrochemical performance of tavorite-structured LiFePO4F by co-doping vanadium and sodium ions. The doped cathodes showed reduced particle size, improved reversible capacities, stable cycle performance, better rate capability, and decreased charge transfer resistance. Sodium addition proved to be beneficial for improving the charge transfer kinetics in the lithium vanadium fluorophosphate-based cathodes for lithium-ion batteries.
Article
Materials Science, Multidisciplinary
Yuhai Qu, Xiaoming Sun, Wanyuan Gui, Runguang Li, Zhihua Nie, Zhiyong Gao, Wei Cai, Yang Ren, Yandong Wang, Daoyong Cong
Summary: Magnetic-field-induced first-order magnetostructural transition (MFI-FOMST) has various magnetoresponsive effects, but practical applications have been limited by the high critical field. In this study, we achieved complete and reversible MFI-FOMST under a low field of 1.5 T in a prototype shape memory alloy. This was made possible by enlarging the distance between Curie transition and magnetostructural transition and manipulating the geometric compatibility between phases. The low critical field provides opportunities for low-field-induced large reversible magnetoresponsive effects and practical applications of MSMAs.
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Ceramics
Abhijit Pramanick, Laurent Daniel, Sarangi Venkateshwarlu, Valentin Segouin, Yang Ren
Summary: Through experimental and modeling results, we have discovered a unique tetragonal-to-orthorhombic-to-tetragonal phase transformation induced under low electric fields (< 1 kV/mm) in grains with 002 crystallographic poles oriented either within 20 degrees or orthogonal to the applied electric-field direction in a polycrystalline Pb-free piezoceramic. In contrast, grains with their 002 poles oriented 30 degrees- 80 degrees to the electric-field direction undergo a continuous tetragonal-to-orthorhombic transformation for electric fields larger than 1 kV/mm. These findings highlight the critical role of a phase-transition-assisted domain switching mechanism in grains of specific orientations towards achieving a large electrostrain coefficient of d(33)* similar to 600 pm/V under low electric fields (< 1 kV/mm) in the Pb-free Sn-doped (Ba,Ca)(Zr,Ti)O-3 piezoceramic.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Yingchao Li, Junsong Zhang, Martin Saunders, Yang Ren, Hong Yang, Yinong Liu
Summary: By utilizing the principles of lattice strain matching and collective atomic load transfer, ultralarge elastic strains were induced in a brittle NiTi-Nb3Sn eutectic composite, where Nb3Sn lamellae achieved a remarkable elastic lattice strain of -2.4%. This study both tests the applicability of lattice strain matching in brittle materials and explores a novel fabrication approach for in-situ composites via eutectic solidification.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Mince Li, Li Wang, Yujie Wang, Xu Chen, Zonghai Chen
Summary: This article proposes a co-estimation framework for the state-of-charge (SoC) and remaining discharging time (RDT) of the hybrid energy storage system (HESS) based on fractional-order theory. The framework includes the establishment of fractional-order models (FOMs) using electrochemical impedance spectroscopy (EIS), parameter identification using grey wolf optimizer (GWO), SoC estimation using fractional extended Kalman filter (FEKF), and validation using experimental data. The results show high precision and fast convergence rate of the proposed co-estimation method under typical working conditions.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Peng Luo, Zhenduo Wu, Wentao Zhang, Sinan Liu, Si Lan, Jonathan D. Almer, Yang Ren, Xun-Li Wang, Weihua Wang
Summary: Studying the flow behavior of amorphous solids is crucial for understanding their deformation mechanism, but detecting basic flow events in these materials is challenging. Using simultaneous SAXS/WAXS experiments, researchers have identified elementary flow carriers in wound metallic glasses, with a radius of gyration ranging from 2.5 to 3.5 nm, based on flow-induced structural heterogeneities. The size of these carriers increases and their morphology changes from spherical to rod-like during flow. Additionally, the atomic structure undergoes an unusual change to a more disordered state during winding/annealing at a temperature around 0.8 Tg. This work provides an atomic-to-nanoscale description of flow carriers in amorphous solids during deformation.
MATERIALS RESEARCH LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hongyan Yuan, Zhendong Sun, Yujie Wang, Zonghai Chen
Summary: This study proposes a deep reinforcement learning controller (FO-DDPG) based on fusion optimization and a control optimization strategy based on net power optimization to address the coordination problem in the flow control of air and hydrogen in a proton exchange membrane fuel cell system. The experimental results demonstrate that the undecoupled FO-DDPG algorithm has a faster dynamic response and more stable static performance compared to other control algorithms.
WORLD ELECTRIC VEHICLE JOURNAL
(2023)
Article
Electrochemistry
Ruilong Xu, Yujie Wang, Zonghai Chen
Summary: This paper proposes a data-driven approach for battery aging mechanism analysis and degradation pathway prediction. The dominant aging modes and critical aging factors affecting battery capacity decay are determined through statistical analysis methods. A data-driven multi-factor coupled battery aging mechanism prediction model is developed using the Transformer network and regression-based data enhancement. Experimental results show that the proposed approach achieves satisfactory performances under different aging conditions.
Article
Energy & Fuels
Li Wang, Zonghai Chen, Yan Liu, Yuan Li, Hao Zhang, Xiangming He
Summary: The safety concerns of lithium-ion batteries (LIBs) have hindered their widespread application in electric vehicles and stationary energy storage. Solid-state lithium batteries with nonflammable electrolytes have been proposed as a potential solution for better safety. However, the safety of solid-state lithium metal batteries (SS-LMBs) remains uncertain. This review summarizes recent investigations on the safety concerns of SS-LMBs and provides a systematic analysis and discussion.
Article
Chemistry, Multidisciplinary
Yanming Sun, Yili Cao, Shixin Hu, Maxim Avdeev, Chin-Wei Wang, Sergii Khmelevskyi, Yang Ren, Saul H. Lapidus, Xin Chen, Qiang Li, Jinxia Deng, Jun Miao, Kun Lin, Xiaojun Kuang, Xianran Xing
Summary: By high-temperature synthesis, researchers have achieved tunable thermal expansion in the kagome cubic (Fd-3m) intermetallic (Zr,Nb)Fe-2 materials. By magnetic doping, they have obtained a near-zero thermal expansion coefficient, which has significant applications in advanced technologies.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xiang Xiao, Li Wang, Yingqiang Wu, Youzhi Song, Zonghai Chen, Xiangming He
Summary: 'Green ambition towards sustainability' is a hot research topic of the 21st century. Lithium-ion batteries (LIBs) play a significant role in the energy revolution, but their production and disposal raise concerns about the supply of raw materials and waste management. Cathode regeneration and upcycling technologies offer solutions to repair and reuse degraded cathode materials, promoting a circular economy and upgrading battery chemistry.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Shiqi Lin, Jikai Wang, Meng Xu, Hao Zhao, Zonghai Chen
Summary: In this article, a new RGB-D object-level SLAM method is proposed, which utilizes projection constraints between dense object models and their instance masks. The method addresses the challenges of modeling unstructured objects and quantifying reprojection errors. A covisibility graph is constructed to maintain a real-time local map, and a multiview bundle adjustment formulation is proposed to optimize the local map components. Experimental results demonstrate the competitive performance of the proposed method.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Multidisciplinary
Fan Xue, Qiang Li, Mingxin Lv, Yuanfei Song, Tianxing Yang, Xiaoge Wang, Tianyi Li, Yang Ren, Koji Ohara, Yufei He, Dianqing Li, Qiheng Li, Xin Chen, Kun Lin, Xianran Xing
Summary: This study reports the local structure of Pd nanocatalysts, revealing the atomic surface distribution of unique compressed strain in Pd nanocatalysts. The surface strain, induced by the shape of the catalyst, significantly weakens the adsorption energy of ethylene and avoids the over-hydrogenation of acetylene, leading to higher selectivity for ethylene.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jian Hui, Qingyun Hu, Hongjian Yuan, Ruiqian Shi, Xiang Huang, Yuanyuan Wu, Yang Ren, Zhan Zhang, Hong Wang
Summary: By using high-throughput experiments, the optical properties and structural evolution of Ge-Sb-Te alloy films were studied, and it was found that the modulation period and chemical composition have a significant impact on amorphous stability and optical properties.
Article
Materials Science, Multidisciplinary
Jiacheng Ge, Yao Gu, Zhongzheng Yao, Sinan Liu, Huiqiang Ying, Chenyu Lu, Zhenduo Wu, Yang Ren, Jun-ichi Suzuki, Zhenhua Xie, Yubin Ke, Jianrong Zeng, He Zhu, Song Tang, Xun-Li Wang, Si Lan
Summary: Fe-based metallic glasses are promising materials in the fields of advanced magnetism and sensors. This study proposes a novel approach to tailor the amorphous structure through liquid-liquid phase transition, and provides insights into the correlation between structural disorder and magnetic order. The results show that the liquid-liquid phase transition can induce more locally ordered nanodomains, leading to stronger exchange interactions and increased saturation magnetization. The increased local heterogeneity also enhances magnetic anisotropy, resulting in a better stress-impedance effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
