Article
Chemistry, Multidisciplinary
Ying Zhang, Shuanghao Zheng, Caixia Meng, Hanqing Liu, Cong Dong, Xiaoyu Shi, Pratteek Das, Rong Huang, Yan Yu, Zhong-Shuai Wu
Summary: A near-surface reconfiguration strategy by fluorinating graphene is proposed to precisely regulate Mn3+/Mn4+ and O2-/(O-2)(n-) redox couples for stabilizing high-capacity lithium-rich layered oxides (LROs). The strategy also reduces lattice stress, regulates the charge state of Mn metal, and constructs 3D Li+ diffusion channels. The graphene-coating layer suppresses oxygen loss, metal dissolution, and electrolyte decomposition, leading to improved performance of LROs in lithium-ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
Hong Zhao, Wai-Yu Ashley Lam, Li Sheng, Li Wang, Peng Bai, Yang Yang, Dongsheng Ren, Hong Xu, Xiangming He
Summary: This review article presents the progress of cobalt-free cathodes made with lithium-rich oxides, nickel-rich layered oxides, and spinel lithium nickel manganese oxide (LNMO). The roles of cobalt are clarified, and the performance and commercialization prospects of these materials are objectively assessed.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Youngjin Kim, Won Mo Seong, Arumugam Manthiram
Summary: This article discusses the necessity and key factors for developing cobalt-free high-Ni layered oxides from the perspective of materials science and electrochemistry. Several aspects that need to be considered and the exploration of alternative dopants and substituents are proposed.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yu Zhang, Shuting Zhang, Huinan Li, Yuran Lin, Mengwei Yuan, Caiyun Nan, Chen Chen
Summary: Reasonable design of catalyst structure improves the decomposition performance of Li2O2 in lithium-oxygen batteries, thereby enhancing the reversibility and cycling stability of the battery.
Article
Chemistry, Physical
Weibo Hua, Suning Wang, Kai Wang, Alexander Missyul, Qiang Fu, Mariyam Susana Dewi Darma, Hang Li, Volodymyr Baran, Laijun Liu, Christian Kuebel, Joachim R. Binder, Michael Knapp, Helmut Ehrenberg, Sylvio Indris
Summary: Investigated an ion-exchange reaction between layered oxides and carbonate electrolyte at room temperature, resulting in novel cathode materials for lithium-ion batteries with good electrochemical performance for lithium ion accommodation.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xin Cao, Jianming Sun, Zhi Chang, Pengfei Wang, Xiyan Yue, Jun Okagaki, Ping He, Eunjoo Yoo, Haoshen Zhou
Summary: In this study, a Co/Ni-free biphasic O2/O3-type layered cathode material Li-0.9[Li0.3Mn0.7]O-2 is proposed and characterized. The biphasic cathode demonstrates high discharge capacity and long-term cycle stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Munir M. Besli, Anantharaman Subbaraman, Farshad R. Pour Safaei, Christina Johnston, Gerhard Schneider, Nikhil Ravi, Jake Christensen, Yijin Liu, Marca M. Doeff, Michael Metzger, Saravanan Kuppan
Summary: The study investigates the impact of a physics-based, electrochemically optimized fast-charging algorithm on mobile devices. It is found that fast-charging without the optimized algorithm leads to lithium deposits on the anode, causing capacity decay. In experiments, degraded spots on harvested cathodes seem to be reactivated and participate in the intercalation process when lithiumated at low rates from lithium foil counter electrodes.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhenkun Hao, Haoxiang Sun, Youxuan Ni, Gaojing Yang, Zhuo Yang, Zhimeng Hao, Ruihan Wang, Pengkun Yang, Yong Lu, Qing Zhao, Weiwei Xie, Zhenhua Yan, Wei Zhang, Jun Chen
Summary: Layered oxides are commonly used as cathodes in lithium-ion batteries. In this study, a thin and coherent spinel-like phase was constructed on the surface of lithium-rich layered oxides (LLOs) to suppress bulk strain and surface oxygen release. The modified LLOs showed improved structural stability and cycling performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Huangkai Zhou, Jun Izumi, Sho Asano, Kotaro Ito, Kenta Watanabe, Kota Suzuki, Fumiya Nemoto, Norifumi L. Yamada, Kohei Aso, Yoshifumi Oshima, Ryoji Kanno, Masaaki Hirayama
Summary: This study investigates the effect of oxide modification on the fast lithium intercalation on cathode surfaces using in situ neutron reflectometry. The results show that the modified cathode exhibits superior rate capability due to the formation of a dense cathode-electrolyte interphase (CEI). The fast desolvation of lithium on the CEI contributes to the high rate capability of surface-modified cathodes.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
Jiangnan Huang, Fangjun Zhu, Yuming Shu, Guorong Hu, Zhongdong Peng, Yanbing Cao, Jianbin Jiang, Shuai Zhang, Xin Wang, Ke Du
Summary: By simultaneously introducing Al ions and B ions, the structural stability of lithium-rich material Li0.6[Li0.2Mn0.8]O2 is improved, leading to enhanced electrochemical performance and increased capacity retention after cycling.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Vladimir E. Zhivulin, Evgeniy A. Trofimov, Svetlana A. Gudkova, Igor Yu Pashkeev, Alexander Yu Punda, Maksim Gavrilyak, Olga Zaitseva, Sergey Taskaev, Fedor Podgornov, Moustafa A. Darwish, Munirah A. Almessiere, Yassine Slimani, Abdulhadi Baykal, Sergei Trukhanov, Alex Trukhanov, Denis A. Vinnik
Summary: La-, Nd- and La/Nd-based polysubstituted high-entropy oxides were prepared by solid-state reactions, with their chemical composition correlating well with initial calculated stoichiometry. The electrical and magnetic properties were investigated, showing the dependence of particle size on chemical composition and the observation of spin subsystem states.
Article
Materials Science, Multidisciplinary
Daryl W. Yee, Michael A. Citrin, Zane W. Taylor, Max A. Saccone, Victoria L. Tovmasyan, Julia R. Greer
Summary: The use of aqueous metal salt solutions as metal precursors enables the fabrication of 3D multicomponent metal oxides using digital light processing printing, resulting in structures with good electrochemical performance in lithium-ion battery electrodes.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Ao Deng, Jing Lu, Dongxu Li, Yanhui Wang
Summary: By conducting first-principle calculations, the activation energies of diamond reacting with various metals and metal oxides were obtained, revealing the reaction order and validating the rationality of the results. Experimental evidence demonstrated the reduction of NiO and CuO to Ni and Cu by diamond, indicating a redox reaction occurring between diamond and metal oxides.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Jialong Qian, Li Sun, Ke Wang, Yihe Zhang
Summary: Metallic cobalt phosphide (CoP) modified by nanocrystallization and carbon compositing methods achieves improved conductivity and electrode stability, resulting in high capacity retention rate and remaining specific capacity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xinjian Li, Yanhui Su, Yong Ma, Le Wei, Ying He, Yuting Gu, Shiwei Mei, Qiaoqiao Mu, Chengyuan Peng, Yang Peng, Zhao Deng
Summary: In this study, a photoactive electron mediator was successfully applied for the first time as a bifunctional photocathode catalyst in solar-assisted Li-O2 batteries, resulting in high efficiency and low cost for the cathode reactions. The synthesized cobalt complex showed excellent electrocatalytic activity in dark conditions and high photoactivity under illumination, leading to improved charge/discharge voltage gap and round-trip efficiency of the batteries. Furthermore, the light-induced amorphization of Li2O2 was found to enhance the charge/discharge reversibility and extend the cycle life of the batteries. A two-circuit model was proposed to explain the reduction of charge/discharge polarization at lower operating current density. This work not only expands the family of photocathode catalysts, but also provides new insights into the mechanism of photoenergy storage in Li-O2 batteries.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Yuta Kimura, Aina Tomura, Mahunnop Fakkao, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Energy & Fuels
Titus Masese, Kazuki Yoshii, Kohei Tada, Minami Kato, Satoshi Uchida, Keigo Kubota, Toshiaki Ina, Toyoki Okumura, Zhen-Dong Huang, Junya Furutani, Yuki Orikasa, Hiroshi Senoh, Shingo Tanaka, Masahiro Shikano
Article
Chemistry, Physical
Yuta Kimura, Mahunnop Fakkao, Takashi Nakamura, Toyoki Okumura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
Kazuki Yoshii, Hisao Kiuchi, Noboru Taguchi, Masahiro Shikano, Eiichiro Matsubara, Hikari Sakaebe
Article
Chemistry, Physical
Toyoki Okumura, Tomonari Takeuchi, Hironori Kobayashi
Summary: An impurity-free interface was achieved in an oxide-based all-solid-state battery (ASSB) through cosintering, with enhanced thermal stability between the LiMO electrode materials and LISICON-type LGVO electrolyte. The high ionic conductivity of LGVO facilitated good reversible capacity in the NMC electrode, making it a promising property in oxide-based ASSBs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Titus Masese, Yoshinobu Miyazaki, Josef Rizell, Godwill Mbiti Kanyolo, Chih-Yao Chen, Hiroki Ubukata, Keigo Kubota, Kartik Sau, Tamio Ikeshoji, Zhen-Dong Huang, Kazuki Yoshii, Teruo Takahashi, Miyu Ito, Hiroshi Senoh, Jinkwang Hwang, Abbas Alshehabi, Kazuhiko Matsumoto, Toshiyuki Matsunaga, Kotaro Fujii, Masatomo Yashima, Masahiro Shikano, Cedric Tassel, Hiroshi Kageyama, Yoshiharu Uchimoto, Rika Hagiwara, Tomohiro Saito
Summary: Honeycomb layered oxides are a class of emerging materials with peculiar physicochemical properties. The authors report the synthesis and electrochemical energy storage characterizations of a mixed-alkali honeycomb layered oxide material capable of storing Na and K ions simultaneously.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Guowei Zhao, Kota Suzuki, Toyoki Okumura, Tomonari Takeuchi, Masaaki Hirayama, Ryoji Kanno
Summary: In this study, lithium superionic conductors with gamma-Li3PO4-type structures were developed to investigate the multicomponent effects on ion-conducting properties. The results showed that framework cations with larger ionic radii exhibited enhanced conductive properties, and the changes in ionic conductivity associated with the ionic radius were larger in ternary systems than those in binary systems.
CHEMISTRY OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Miyuki Sakakura, Kazutaka Mitsuishi, Toyoki Okumura, Norikazu Ishigaki, Yasutoshi Iriyama
Summary: Combining Garnet-type LLZ and LISICON-type LGVO as a multilayer solid electrolyte sheet can effectively reduce reactivity issues during the sintering process, improving the performance and cycle life of solid-state batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yuta Kimura, Su Huang, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Tomonari Takeuchi, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa
Summary: A method combining operando computed tomography and X-ray absorption near-edge structure spectroscopy (CT-XANES) is proposed in this paper to directly track the evolution of the 3D distribution of local capacity loss in battery electrodes. The method enables a five-dimensional analysis of degradation, including spatial coordinates, time, and chemical state. It quantifies the spatiotemporal dynamics of local capacity degradation and correlates it with overall electrode performance, providing critical insights for identifying degradation factors and developing batteries with long-term stability.
Article
Chemistry, Multidisciplinary
Toyoki Okumura, Yoshitaka Shiba, Noriko Sakamoto, Takeshi Kobayashi, Saori Hashimoto, Kentaro Doguchi, Harunobu Ogaki, Tomonari Takeuchi, Hironori Kobayashi
Summary: By substituting tetravalent ions and creating vacancies, the ionic conductivity of Li6Y(BO3)(3) (LYBO) was enhanced, leading to good reversible capacities in solid-state batteries.
Article
Nanoscience & Nanotechnology
Masahiro Mori, Shingo Tanaka, Masahiro Shikano, Hikari Sakaebe
Summary: By calculating the stable atomic and electronic states of vanadium-substituted trirutile-type LixFeF3, it was found that the x = 0.50 configurations were the most stable for all y values studied. In cases where Fe and V coexisted, compositions with the same Li insertion as Fe substitution were energetically stable. The results suggest that Fe (or V) in LixFe1-yVyF3 preferentially decreases (or increases) its formal valence state with Li insertion.
Article
Chemistry, Physical
Keiji Shimoda, Masahiro Shikano, Miwa Murakami, Hikari Sakaebe
JOURNAL OF POWER SOURCES
(2020)
Article
Chemistry, Multidisciplinary
Kazuki Yoshii, Noboru Taguchi, Takeshi Miyazaki, Masahiro Shikano, Hikari Sakaebe
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Toyoki Okumura, Sou Taminato, Yoshinobu Miyazaki, Michinori Kitamura, Tomohiro Saito, Tomonari Takeuchi, Hironori Kobayashi
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Hitomi Nakamura, Kenji Shinozaki, Toyoki Okumura, Katsuhiro Nomura, Tomoko Akai
