Article
Chemistry, Multidisciplinary
Gang Wang, Shuai Yang, Youchi Ding, Mingxia Lu, Bingyan Hua, Jiaqi Kang, Wenshuai Tang, Hongliang Wei, Limin Zhu, Xiaoyu Cao
Summary: A new flexible aromatic polymer sulfonated polybenzothiazole (sPBT-SE) is reported as an advanced cathode material for storing Na+, delivering a high discharge capacity of 103 mA h g(-1) after 350 cycles at 30 mA g(-1).
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Bingjue Wang, Yong Hu, Xiaoping Zhang, Zhihao Shi, Ling Wu, Yulei Sui
Summary: In this study, Na3V2(PO4)(2)F-3 is introduced into Na2MnPO4F cathode material to improve its electron/ionic conductivity and enhance its electrochemical performance. The optimized Na2MnPO4F·Na3V2(PO4)(2)F-3/C cathode material exhibits a first discharge capacity of 126.6 mAh·g-1 at 0.05C and good rate performance (76.9 mAh·g-1 at 1C rate), with 93.2% capacity retention after 400 cycles. This research provides a promising guide for the development of Na2MnPO4F-based cathode materials for sodium ion batteries.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Xudong Liu, Zhibin Ye
Summary: This study introduces a group of organic nitroaromatic compounds as novel high-energy cathode materials with record-high reversible capacities, demonstrating potential for next-generation alkali-ion batteries.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoqin Huang, Deli Li, Haijian Huang, Xiao Jiang, Zeheng Yang, Weixin Zhang
Summary: The Zn/Mg dual-doped P2-Na0.67MnO2 with lower Mn3+/Mn4+ ratio and higher lattice O content shows improved structural stability and enhanced ion diffusion, leading to high rate performance and decent cycling stability. This co-doping strategy provides a promising avenue for further enhancing the performance of layered Na-ion batteries cathode materials.
Article
Chemistry, Multidisciplinary
Yueyue He, Soeren L. Dreyer, Yin-Ying Ting, Yuan Ma, Yang Hu, Damian Goonetilleke, Yushu Tang, Thomas Diemant, Bei Zhou, Piotr M. Kowalski, Maximilian Fichtner, Horst Hahn, Jasmin Aghassi-Hagmann, Torsten Brezesinski, Ben Breitung, Yanjiao Ma
Summary: The high-entropy approach is applied to address the issue of unfavorable multilevel phase transitions in Na-ion cathodes, leading to poor stability and capacity decay. By synthesizing Mn-based samples with multiple metal species, a superior cathode material for Na-ion batteries, exhibiting high cyclability, is discovered. Computational comparisons and characterization techniques provide insights into the benefits of high-entropy structure, such as suppression of phase transitions and mitigation of gas evolution, during battery operation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Haoji Wang, Xu Gao, Shu Zhang, Yu Mei, Lianshan Ni, Jinqiang Gao, Huanqing Liu, Ningyun Hong, Baichao Zhang, Fangjun Zhu, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Xiao-Yu Cao, Hongyi Chen, Xiaobo Ji
Summary: A configurational entropy tuning protocol is proposed to design Na-deficient, O3-type Na x TmO2 cathodes, which can enhance the kinetics and stability of the electrodes. The entropy effect also contributes to the improved redox reversibility and phase transition behaviors. The prepared entropy-tuned cathode exhibits impressive rate capability, cycling stability, and air stability.
Article
Chemistry, Physical
Dominika Baster, Lukasz Kondracki, Emad Oveisi, Sigita Trabesinger, Hubert H. Girault
Summary: Sodium-vanadium hexacyanoferrate shows high and stable working potential in a liquid organic electrolyte, achieving excellent capacity retention after 200 cycles. Vanadium substitution in the Prussian blue crystal structure improves cycle life and represents progress in developing cathode materials for Na-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Electrochemistry
Bizhe Su, Hanqin Liang, Xiaohui Zhao, Tao Zhang, Yu Zhou, Denis Y. W. Yu
Summary: Two sodium-rich transition metal oxides, Na2MoO4 and Na2WO4, with the same spinel structure, are studied as cathode materials for Na-ion batteries for the first time. Both compounds can be activated by anionic redox reaction during initial charge, providing reversible capacity between 1.2 and 4.7 V. Na2WO4 exhibits larger Na extraction/insertion and better cycle stability compared to Na2MoO4, likely due to its better structural integrity and stability against oxygen loss.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Feixiang Ding, Qingshi Meng, Pengfei Yu, Haibo Wang, Yaoshen Niu, Yuqi Li, Yang Yang, Xiaohui Rong, Xiaosong Liu, Yaxiang Lu, Liquan Chen, Yong-Sheng Hu
Summary: This study introduces an additive-free self-presodiation strategy to improve the performance of sodium-ion batteries by creating lattice-coherent cathodes through quenching treatment, resulting in higher energy density and capacity retention.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
A. Shahul Hameed, Mirai Ohara, Kei Kubota, Shinichi Komaba
Summary: A phosphite-based layered polyanionic material was explored as a positive electrode for Na-ion batteries with high energy density and long cycle life. The material exhibited high discharge capacity in Na half-cells, and capacity fading was overcome through ball-milling with carbon. The layered material facilitated the migration of large Na+ ions, resulting in superior rate performance and long-term cycling stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Shiqi Wang, Mingsheng Qin, Meng Huang, Xing Huang, Qi Li, Ya You
Summary: Prussian blue with a monoclinic structure is successfully synthesized using an organic-based solvothermal strategy, resulting in a stable lattice structure and enhanced sodium ion storage performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Electrochemistry
Vishnu Sudarsanan, Anu Maria Augustine, P. Ravindran
Summary: Considering the demand for energy storage systems and the issues with current cathode materials, we conducted studies on a carbonate-based prototype cathode material for Na-ion batteries using first-principles calculations. We predicted the existence of a carbon-containing Mn compound and its crystal structure, and found that it has a theoretical capacity of 243 mAh/g and a theoretical average voltage of 3.6 V. We modeled the desodiation process and identified the involvement of Mn, O, and C. We also analyzed the chemical bonding and estimated the diffusion barrier for Na diffusion. The results suggest that the compound has potential for high rate capability.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Junghoon Yang, Jin-Myoung Lim, Mihui Park, Gi-Hyeok Lee, Suwon Lee, Maenghyo Cho, Yong-Mook Kang
Summary: Layer-structured oxide cathodes have various phases depending on Na ion contents, with off-stoichiometry impacting properties like capacity and cyclic stability. Thermal activation process helps maintain stoichiometry, reduce Na ion loss, and improve electrochemical performance of materials.
ADVANCED ENERGY MATERIALS
(2021)
Article
Electrochemistry
Atin Pramanik, Alexis G. Manche, Megan T. Smeaton, Moulay-Tahar Sougrati, Philip Lightfoot, Anthony Robert Armstrong
Summary: The iron-based polyanionic fluoro-oxalate material, KFe(C2O4)F (KFCF), synthesized by hydrothermal methods, exhibits promising reversible lithium and sodium insertion properties as a cathode material. In lithium-ion and sodium-ion batteries, the material achieved a first-cycle discharge capacity of 120 mAh g(-1) and 97.4 mAh g(-1) at voltages of approximately 3.3 V (Li+/Li) and 3.0 V (Na+/Na) respectively. Stable cycling performance was observed in both cases. The involvement of reversible Fe2+/Fe3+ redox was confirmed through ex-situ Mossbauer spectroscopy and first-principles calculations. This study demonstrates the potential of mixed oxalate-fluoride based polyanionic materials in the development of new electrode materials.
Review
Materials Science, Multidisciplinary
Zhi Zheng, Chang Wu, Qinfen Gu, Konstantin Konstantinov, Jiazhao Wang
Summary: Rechargeable sodium-oxygen and sodium-carbon dioxide batteries have the potential for high energy density and practical applications, but they are currently hindered by challenges such as low efficiency and limited cycle life. Understanding the working principles and reactions of electrodes is crucial for achieving their practical application, with a focus on mechanisms, anode protection, and electrolyte stability.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
