Article
Electrochemistry
Jaeyoung Choi, Jiasheng Wang, Taketoshi Matsumoto
Summary: Composite electrodes using flake-shaped Si nanopowder from swarf treated as industrial waste and ultrathin graphite sheets demonstrate better cycling performance and delithiation capacities compared to C-coated Si electrodes, attributed to the formation of GS bridges and stable frameworks.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Mingchao Wang, Han Ye
Summary: This study investigates the microstructure effect on the chemo-mechanical properties of amorphous silicon (a-Si) anodes upon delithiation using molecular dynamics simulations. The results suggest that structural disorder and tensile reaction stress may cause undesirable capacity fading of a-Si anodes and detrimental effects on battery performance during delithiation.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Jihyun Jang, Hyun-seung Kim, San Moon, Oh B. Chae, Sung-Jin Ahn, Heechul Jung, Junghyun Choi, Seung M. Oh, Ji Heon Ryu, Taeho Yoon
Summary: This study investigates the initial Coulombic efficiency (ICE) of conversion-type MoO3 and reveals the failure mechanism during delithiation. The highly delithiated outer region of MoO3 particles forms a layer with low electronic conductivity, impeding further delithiation. This finding provides critical guidance for the development of conversion-type anode materials with improved electrochemical reversibility.
Article
Materials Science, Ceramics
Yangzhou Ma, Haoduo Li, Qi Li, Jingwei Zhou, Zhenfei Cai, Shuai Wang, Mo Yu, Cheng Liu, Guangsheng Song, Cuie Wen
Summary: Researchers introduced a zero-strain Li-ion conductor TiNbO4 (TNO) coating on the surface of industrial submicron Si to address the volume change issue. The coating was found to be well distributed on the Si particles and effectively improved the cycle performance of the Si anode.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Chemistry, Physical
Amol Bhairuba Ikhe, Woon Bae Park, Su Cheol Han, Jung Yong Seo, Suyeon Han, Kee-Sun Sohn, Myoungho Pyo
Summary: Anode-free lithium-ion batteries (AFLIBs) show great potential for energy density improvement, but their performance, especially cycle stability, needs to be improved. This study demonstrates for the first time that carbon cloth (CC) can enable AFLIBs with unprecedented cyclability by forming a stable solid electrolyte interface (SEI) layer and enhancing Li+ ion flux and nucleation.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Rahmandhika Firdauzha Hary Hernandha, Bharath Umesh, Purna Chandra Rath, Le Thi Thu Trang, Ju-Chao Wei, Yu-Chun Chuang, Ju Li, Jeng-Kuei Chang
Summary: The lithiation/delithiation properties of alpha-Si3N4 and beta-Si3N4 are compared and the carbon coating effects are examined. Then, beta-Si3N4 at various fractions is used as the secondary phase in a Si anode to modify the electrode properties. The incorporated beta-Si3N4 decreases the crystal size of Si and introduces a new N-Si-O species at the beta-Si3N4/Si interface.
Article
Chemistry, Physical
Linshan Luo, Feng Zheng, Haowen Gao, Chaofei Lan, Zhefei Sun, Wei Huang, Xiang Han, Ziqi Zhang, Pengfei Su, Peng Wang, Shengshi Guo, Guangyang Lin, Jianfang Xu, Jianyuan Wang, Jun Li, Cheng Li, Qiaobao Zhang, Shunqing Wu, Ming-Sheng Wang, Songyan Chen
Summary: The failure mechanism of ionic conductor interlayers, especially the influence from electron penetration, remains largely unknown. An Al-LiF bilayer is found to dramatically promote the interfacial stability between Li/LATP, providing potential for high-performance solid-state batteries.
Article
Chemistry, Physical
Bryan R. Wygant, Igor Kolesnichenko, Noah B. Schorr, Katharine L. Harrison, Timothy N. Lambert
Summary: This study investigates the electrochemical lithiation/delithiation mechanism of FeSx/C composite and demonstrates the multispecies cycling of FeSx and carbon-sulfur species. The experiments show that carbon-sulfur species become the dominant source of capacity over cycling, challenging the previous assumption of carbon inertness. These findings are crucial for accurately reporting capacity metrics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Environmental
Jannes Mueller, Mozaffar Abdollahifar, Andrey Vinograd, Markus Noeske, Christine Nowak, Shu-Jui Chang, Tobias Placke, Wolfgang Haselrieder, Martin Winter, Arno Kwade, Nae-Lih Wu
Summary: The study reports the fabrication of silicon-on-graphite composites using fluidized bed granulation for the first time, showing the formation of core-shell microstructure. By using a suitable binder during the process, the carbon-coated composites exhibit high capacity, high rate capability, and long cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Anu Maria Augustine, Vishnu Sudarsanan, Ponniah Ravindran
Summary: The ordered monoclinic C2/m-Li2MoO3 phase exhibits improved electrochemical properties compared to the rhombohedral R3m phase, with a reduced likelihood of Mo migration to Li sites. During delithiation, C2/m-Li2MoO3 maintains high oxidation and oxygen stability, and partial W substitution at Mo sites further enhances its electrochemical properties.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Shuai Wang, Qinyu Wu, Zhenfei Cai, Ziyang Ma, Zishan Ahsan, Yichun Li, Yangzhou Ma, Guangsheng Song, Weidong Yang, Cuie Wen
Summary: This study proposes a Si/C composite anode (WM-30C) to address the challenges of severe volume expansion and poor ionic transport in micro-Si anodes. The incorporation of a multiphase structure through wet milling and high-temperature heat treatment significantly improves the electrochemical properties of the WM-30C composites, resulting in impressive initial Coulombic efficiency and stable cycling performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shaoqing Rao, Ruizhe Wu, Zhu Zhu, Jinsong Wu, Yao Ding, Liqiang Mai
Summary: Compared with traditional lithium-ion batteries and Li-other group VIA elements batteries, Li-Te batteries have high specific volumetric capacity and superior electrical conductivity, making them important for portable electronics and electric vehicles. However, their Achilles’ heel is the huge volume change and dissolution of polytellurides during cycling. In this research, a cathode material based on Te-filled CNTs was synthesized, which showed improved reaction kinetics and electrochemical reversibility. The use of nanoscale cavities in the CNTs stabilized the polytellurides and enhanced the utilization and cycling stability of the cathodes in Li-Te batteries.
Article
Chemistry, Physical
Miao Cheng, Jianqiang Xia, Jing Hu, Qianqian Liu, Tao Wei, Yun Ling, Wanfei Li, Bo Liu
Summary: A facile method for fabricating nitrogen/oxygen codoped carbon anodes was developed, which exhibited superior performance in terms of cycling stability, rate capability, and Li-ion diffusion kinetics compared to other carbon anode materials. This work provided a new pathway for preparing nitrogen/oxygen codoped carbon derived from renewable resources, which is expected to be a promising candidate for Li-ion battery application.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Sarah E. Holmes, Fang Liu, Wenbo Zhang, Philaphon Sayavong, Solomon T. Oyakhire, Yi Cui
Summary: This study investigates the properties and interfacial interactions that affect the cycling performance of composite solid electrolytes (CSEs) for lithium-based solid-state batteries. By improving the interfacial chemistry, CSEs with core-shell particles show superior electrochemical cycling performance, exhibiting stable cycling and high reversible capacities in cells. Improved electrolyte-Li metal anode interface is crucial for cycling longevity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yidan Cao, Sophie Hans, Julia Liese, Ulrike Werner-Zwanziger, Jun Wang, J. Craig Bennett, R. A. Dunlap, M. N. Obrovac
Summary: Si(CO)(y) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature, forming Si nanograins dispersed in an amorphous Si-O-C matrix. The capacity behavior suggests the formation of inactive SiC and Li4SiO4 during the first lithiation, leading to significantly greater initial coulombic efficiency (ICE) compared to SiOx.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Jae-Hyung Wee, Keita Nomura, Hirotomo Nishihara, Doo-Won Kim, Seungki Hong, Go Bong Choi, Sang Young Yeo, Jin Hee Kim, Ho-Young Jung, Yoong Ahm Kim
Summary: The study modified the edge sites within activated carbons via thermal treatment to investigate the relationship between edge density and hydrogen evolution reaction, showing significant impacts on the electrochemical performance of lead-carbon batteries. High-temperature thermal treatment resulted in decreased defect density and enhanced crystallinity of the activated carbons.
Review
Chemistry, Multidisciplinary
Takeharu Yoshii, Koki Chida, Hirotomo Nishihara, Fumito Tani
Summary: Ordered carbonaceous frameworks (OCFs) are a new class of carbon materials with a three-dimensional ordered structure, high electrical conductivity, thermal/chemical stability, and mechanical flexibility, suitable for various applications. This feature article summarizes the synthetic strategies and characteristics of OCFs in comparison with conventional organic-based frameworks and porous carbons, to discuss their potential applications and further development.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jun Maruyama, Shohei Maruyama, Yukiyasu Kashiwagi, Mitsuru Watanabe, Tsutomu Shinagawa, Toru Nagaoka, Toshiyuki Tamai, Naoya Ryu, Koichi Matsuo, Mao Ohwada, Koki Chida, Takeharu Yoshii, Hirotomo Nishihara, Fumito Tani, Hiroshi Uyama
Summary: While the functions of carbon materials with precisely controlled nanostructures have been reported, their chiral discriminating abilities have not been explored. In this study, chiral discrimination is achieved using helical carbon materials devoid of chiral attachments, and the mechanisms are confirmed through various experiments.
Article
Chemistry, Multidisciplinary
Masanori Yamamoto, Qi Zhao, Shunsuke Goto, Yu Gu, Takaaki Toriyama, Tomokazu Yamamoto, Hirotomo Nishihara, Alex Aziz, Rachel Crespo-Otero, Devis Di Tommaso, Masazumi Tamura, Keiichi Tomishige, Takashi Kyotani, Kaoru Yamazaki
Summary: gamma-Al2O3 nanoparticles promote the pyrolytic carbon deposition of CH4, resulting in the formation of single-walled nanoporous graphene (NPG) without the need for transition metals. This study investigates the early-stage CH4 activation on gamma-Al2O3 nanoparticles for NPG formation, highlighting the importance of oxygen vacancies for promoting NPG growth. The findings provide insights for the precise control of oxygen vacancies in carbon growth.
Article
Chemistry, Physical
Atsushi Gabe, Akira Takatsuki, Masahiko Hiratani, Masato Kaneeda, Yoshiaki Kurihara, Takayuki Aoki, Hiroki Mashima, Takafumi Ishii, Jun-ichi Ozaki, Hirotomo Nishihara, Takashi Kyotani
Summary: This study demonstrates that oxidized carbon blacks can serve as efficient catalysts for the hydrolysis of cellulose, with two types of acidic oxygen-containing functional groups (carboxyl groups and phenol groups) on the external surface exhibiting almost equal catalytic activity towards cellulose molecules.
Article
Nanoscience & Nanotechnology
Tracy T. Chuong, Toshihiko Ogura, Norihito Hiyoshi, Kazuma Takahashi, Sangho Lee, Keita Hiraga, Hiroki Iwase, Akira Yamaguchi, Kiyoto Kamagata, Eriko Mano, Satoshi Hamakawa, Hirotomo Nishihara, Takashi Kyotani, Galen D. Stucky, Tetsuji Itoh
Summary: This study introduces synthesized giant carbon nano-test tubes (GCNTTs) as radiation-insulating materials to improve sample preparation and imaging conditions for cryogenic electron microscopy. High-resolution images of proteins, such as hemoglobin and D-fructose dehydrogenase, were successfully obtained using GCNTTs, which also protected the proteins from radiation-induced denaturation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Zheng-Ze Pan, Wei Lv, Quan-Hong Yang, Hirotomo Nishihara
Summary: The ice-templating approach is a popular method for preparing macroporous monoliths, offering environmental friendliness and low cost. Through a directional freezing process, aligned ice crystals are formed, resulting in a new material genre called aligned macroporous monoliths (AMMs). This review provides an overview of the IT technique and the preparation of AMMs, focusing on two representative AMMs: aligned micro-honeycomb monoliths and aligned microlamellar monoliths. The structural anisotropy and regularity of these AMMs make them suitable for various applications, such as thermal insulation, filtration, energy storage, and structural engineering. The future directions in this research field are also discussed.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Zhijia Huang, Zhiyuan Han, Baozheng Jiang, Yunbo Zhang, Sichen Gu, Chen Zhang, Zhengze Pan, Hirotomo Nishihara, Quan-Hong Yang, Wei Lv
Summary: The paper proposes a dense Li-ion flux regulating layer on the separator to suppress the dendrite growth of Li metal anode, leading to a potential application in next-generation Li metal batteries.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Kenichi Kato, Nobuyoshi Seto, Koki Chida, Takeharu Yoshii, Motohiro Mizuno, Hirotomo Nishihara, Shunsuke Ohtani, Tomoki Ogoshi
Summary: This study reports a new method for the preparation of hexa-aminated trinaphtho[3.3.3]propellane and demonstrates its high activity towards condensation reactions with boronic acids and aldehydes. The resulting amorphous polymeric solid exhibits excellent adsorption capacity for hydrocarbon gases and vapors.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Electrochemistry
Rui Tang, Keita Nomura, Kazutoshi Inoue, Motoko Kotani, Takashi Kyotani, Hirotomo Nishihara
Summary: This study proposes a method for synthesizing edge-free three-dimensional graphene materials, in which the capacitance surface density can be enhanced by increasing the number of graphene stacking layers. The study also discovers that the capacitance of the graphene materials has a quantum origin and successfully quantifies the quantum capacitance.
ELECTROCHIMICA ACTA
(2022)
Review
Chemistry, Inorganic & Nuclear
Ryota Sakamoto, Ryojun Toyoda, Guan Jingyan, Yuta Nishina, Kazuhide Kamiya, Hirotomo Nishihara, Tomoki Ogoshi
Summary: This review summarizes the role of coordination chemistry in the innovation of carbon materials, and introduces the synthesis methods, application areas, and the potential of conductive molecular frameworks as alternative materials in coordination-chemistry-based carbon materials.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Physical
Koki Chida, Takeharu Yoshii, Norihito Hiyoshi, Tetsuji Itoh, Jun Maruyama, Kazuhide Kamiya, Masataka Inoue, Fumito Tani, Hirotomo Nishihara
Summary: Ordered carbonaceous frameworks (OCFs) are unique carbon alloys that combine the advantages of organic-based nanoporous frameworks and carbon materials. This study demonstrates the synthesis of OCFs with single-atomic Co and Cu sites, which show developed microporosity and electrochemical activity, as well as a synergistic effect between Co and Cu.
Meeting Abstract
Chemistry, Physical
Hirotomo Nishihara, Hong-Wei Zhao, Kazuya Kanamaru, Keita Nomura, Mao Ohwada, Masashi Ito, Li-Xiang Li, Bai-Gang An, Toshihide Horikawa, Takashi Kyotani
Article
Chemistry, Physical
Qi Zhao, Masanori Yamamoto, Kaoru Yamazaki, Hirotomo Nishihara, Rachel Crespo-Otero, Devis Di Tommaso
Summary: Chemical vapor deposition of methane onto alumina nanoparticles is an important method for synthesizing graphene meso-sponge. The initial stages of graphene growth on alumina surfaces were studied using density functional theory calculations. The mechanism of methane dissociation and the formation of reactive intermediates were modeled. The study provides insights into the catalytic activity and growth behavior of graphene on alumina surfaces.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Hirotomo Nishihara, Akio Harigaya, Alberto Castro-Muniz, Mao Ohwada, Takashi Kyotani, Yuta Nishina
Summary: Microporous polymers with exposed C-60 surfaces have been synthesized by a new esterification pathway, exhibiting a high specific surface area and enhanced hydrogen spillover.
CHEMICAL COMMUNICATIONS
(2022)