Article
Chemistry, Physical
Shogo Yamazaki, Ryoichi Tatara, Hironori Mizuta, Kei Kawano, Satoshi Yasuno, Shinichi Komaba
Summary: Silicon is a promising anode material for lithium-ion batteries, but its large volume fluctuation during charge-discharge cycling leads to significant capacity decay. In this study, the cycling performance of silicon-based composite electrodes was investigated under different cutoff voltages, and the degradation of the electrolyte and electrodes was analyzed. The results showed that the consumption of the electrolyte additive, FEC, led to decreased discharge capacity at high delithiation cutoff voltages. Additionally, the presence of Li metal in the cell also contributed to FEC consumption. These findings provide insights into the degradation mechanisms of Si-based electrodes and can guide the development of Si-based electrodes for lithium-ion batteries.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Environmental
Bingxin Shen, Ning Fu, Yuwen Chen, Wei Shao, Yurong Yan, Jia Huang, Zhenglong Yang
Summary: This study proposes a method to encapsulate low-cost micron-sized silicon suboxide (m-SiOx) into amorphous B, N co-doped carbon nanotube network (SSBCN) through metal cation-assisted carbonization. The encapsulation enables stable volume variation, efficient electron and Li-ion transfer, and fast electrolyte penetration. The SSBCN exhibits high reversible capacities, excellent rate performance, and long-term cycle stability, surpassing other SiOx-based anodes and presenting a new opportunity for m-SiOx in high-performance LIBs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Yue Feng, Bon Min Koo, Antoine Seyeux, Jolanta Swiatowska, Catherine Henry de Villeneuve, Michel Rosso, Francois Ozanam
Summary: Pure and methylated amorphous silicon thin films were analyzed using time-of-flight secondary ion mass spectrometry to study the lithiation mechanism and biphasic process. Lithiation induced swelling and roughening of the active layer. No measurable Li diffusion was observed after lithiation. Distinct Li profiles were observed for the two materials, with the methylated film showing a slower Li concentration decrease attributed to the presence of nanovoids.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
B. J. Western, M. S. Harcrow, V. C. Lopes, A. J. Syllaios, U. Philipose, C. L. Littler, Sean Andrews, Tallis Chang, John Hong
Summary: Temperature dependent conductivity measurements on phosphine doped hydrogenated amorphous silicon revealed anomalous hopping conduction, with ln sigma proportional to T-p with p approximate to 0.75. Argon dilution affects dopant incorporation and defect formation, leading to anomalous conduction observed in this study. Raman spectroscopy provided additional evidence of structural changes in the silicon network.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Energy & Fuels
Yuanyuan Song, Yuxin Zhang, Yuhong Jin, Hao Wang, Mengqiu Jia
Summary: In this work, a renewable biomass flax-derived amorphous carbon@SnO2@graphene composite (PFC@SnO2@rGO) was reported as an anode material for lithium-ion batteries, showing great cycle stability and high capacity. The unique 3D structure formed by amorphous carbon and reduced graphene oxide significantly suppresses the volume expansion of SnO2 particles and preserves the stability of the electrode structure.
Article
Chemistry, Physical
Maria Jose Piernas-Munoz, Zhenzhen Yang, Minkyu Kim, Stephen E. Trask, Alison R. Dunlop, Ira Bloom
Summary: This study investigates the performance of high-silicon-containing cells at different temperatures for the first time, showing that the addition of FEC significantly affects the capacity loss mechanism. Analysis reveals that FEC can alter the composition of the SEI layer, leading to changes in battery performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Fei Wang, Bo Wang, Zhongliang Yu, Chongyang Zhu, Peng Liu, Jingxuan Li, Bin Wang, Yu Zhou, Dianlong Wang, Hua Kun Liu, Shixue Dou
Summary: Silicon oxide (SiOx) is considered a promising anode material for lithium-ion batteries due to its high energy density and low production cost. However, its low initial coulombic efficiency and rapid capacity attenuation hinder its commercial application. In this study, a scalable pre-lithiation strategy followed by a thermal passivation is proposed to improve the initial coulombic efficiency of SiOx anodes and promote their large-scale commercial use.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Chemistry, Physical
Joonhyeon Kang, Kyunil Rah, Sumin Lee, Se Mi Park
Summary: SiO/graphite composite anode doped with Li or Mg has been studied for its potential in achieving high energy density and quick charging kinetics in lithium ion batteries (LIBs). The dopant effect on the Li deintercalation kinetics from lithiated graphite and the formation of lithium compounds such as lithium silicates and lithium silicides has been investigated. The study reveals that Mg-doping leads to faster Li deintercalation compared to Li-doping, and that dopant plays a crucial role in lithium silicates formation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Akihiro Yamano, Tatsuya Kubo, Fumiya Chujo, Naoto Yamashita, Takashi Mukai, Masanori Morishita, Masahiro Yanagida, Satoshi Furusawa, Naohiko Kikuchi, Tetsuo Sakai
Summary: We developed a non-disassembly and reassembly Li pre-doping technique using perforated electrodes to create Li-ion batteries with a rubber-derived sulfur composite cathode. By externally shorting the anodes and Li metal electrodes using the perforated electrodes, the Li pre-doping of the anodes was achieved, with the degree of pre-doping determined by open circuit voltage measurement. This technique successfully enabled Li pre-doping of graphite anodes in a cell composed of rubber-derived sulfur composite cathodes and graphite anodes, resulting in stable charge-discharge performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Xiao-Hua Zhang, Ru Jiang, Chao-Ying Fan, Dan Xie, Bao Li, Jing-Ping Zhang, Xing-Long Wu
Summary: The hierarchical porous carbon nanotubes network (NOPCT) with high N/O-co-doping content shows excellent performance and cycle stability in Li/Na-ion batteries and hybrid Li metal anodes. It also plays a key role in the sustainability of sulfur electrodes, demonstrating great potential for practical application in advanced ESSs. The study provides valuable insights into the design and development of all-purpose electrode materials for energy storage systems.
Article
Energy & Fuels
Xueyan Li, Zhiyuan Zhang, Kang Fu, Haosong Yang, Xiaoyang Wang, Kung Yang, Hong Ye, Peng Tan
Summary: Uneven force distribution in cells may lead to material deformation and stress concentration, which can impact cell performance and lifespan. By applying a cross tape to the surface of a Li-ion pouch cell, the artificially constructed uneven force distribution phenomenon is intensified. The flexibility of a membrane sensor allows for better conformity to cells and accurate measurement of the stress distribution.
Article
Chemistry, Physical
Yin-Wei Cheng, Chun-Hung Chen, Shih-An Wang, Yi-Chang Li, Bo-Liang Peng, Jun-Han Huang, Chuan-Pu Liu
Summary: This study investigates the effects of boron and arsenic doping on the performance of silicon thin film anode materials in lithium-ion batteries. The results show that boron and arsenic can respectively deteriorate and enhance the capacity retention and rate capabilities of the pristine materials.
Article
Electrochemistry
Nutthaphon Phattharasupakun, Marc M. E. Cormier, Erin Lyle, Eniko Zsoldos, Aaron Liu, Chenxi Geng, Yulong Liu, Hongyang Li, Montree Sawangphruk, J. R. Dahn
Summary: The study found that the amount of Ni in the Li layer significantly affects the diffusion coefficient of Li in Li-deficient LNO materials, with higher Ni content leading to poorer kinetic properties.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Yuxin Chen, Loraine Torres-Castro, Kuan-Hung Chen, Daniel Penley, Joshua Lamb, Mohan Karulkar, Neil P. Dasgupta
Summary: In this study, incremental capacity analysis was applied to investigate lithium plating during charging process. The results showed the correlation between lithium plating and specific IC peak, and demonstrated the applicability of IC analysis in studying lithium plating in novel cell architectures.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Arunakumari Nulu, Venugopal Nulu, Keun Yong Sohn
Summary: The study finds that transition metal-doped silicon anodes exhibit improved electrochemical performance, including enhanced capacity retention and rate capability. Metal dopants enhance silicon's conductivity, mitigate volume expansion, and provide better Li+ diffusion properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Satoshi Hashigami, Kei Yoshimi, Yukihiro Kato, Hiroyuki Yoshida, Toru Inagaki, Masakazu Haruta, Michihiro Hashinokuchi, Takayuki Doi, Minoru Inaba
Article
Nanoscience & Nanotechnology
Satoshi Hashigami, Yukihiro Kato, Kei Yoshimi, Akihiro Fukumoto, Ziyang Cao, Hiroyuki Yoshida, Toru Inagaki, Michihiro Hashinokuchi, Masakazu Haruta, Takayuki Doi, Minoru Inaba
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Electrochemistry
Masakazu Haruta, Hiroto Konaga, Takayuki Doi, Minoru Inaba
Summary: The cycle performance of silicon nano-flake powder anodes was improved by coating them with perfluorosulfonic acid polymers as an artificial solid electrolyte interphase. The Nafion coating improved capacity retention and Coulombic efficiency by forming a LiF-rich SEI, which effectively suppressed electrolyte decomposition. Different types of PFSA polymers had similar positive effects on the cycle performance of the silicon electrodes, and the addition of fluoroethylene carbonate as an SEI-forming additive further enhanced the cycle life.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Erika Svensson, Masakazu Haruta, Minoru Inaba, Takayuki Doi
Summary: Lithium bis(fluorosulfonyl)imide (LiFSI)-based saturated electrolyte solutions were developed to inhibit the corrosion of Al current collectors for LiNi0.8Co0.1Mn0.1O2 (NCM811) positive electrodes. The combination of a conventional solvent and a fluorinated diluent showed corrosion inhibitory effect at high voltage charging for Li|NCM811 cells, while Al corrosion continued at a typical charging cutoff voltage of 4.3 V. The charge/discharge capacities exceeded 200 mAh/g, and remained high in prolonged cycles. The structure of the saturated electrolyte solutions was studied using Raman spectroscopy and theoretical calculation, and the effects of dilution on Al corrosion inhibition were investigated using cyclic voltammetry. The surface morphology and composition of NCM811 electrodes and Al current collectors after charge/discharge cycles were characterized by SEM/EDX and XPS.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
Syunya Takamori, Takayuki Doi, Minoru Inaba
Summary: Large-size single crystal LiNi0.8Co0.1Mn0.1O2 (NCM811) particles of 5 mu m in size were prepared using a temperature-swing technique. These single crystal particles showed good cycleability with Al doping at an optimized level, delivering an initial capacity of 174 mAh g(-1) and maintaining good cycleability up to the 50th cycle. Additionally, Al doping improved the rate-capability of NCM811 single crystal particles, comparable to conventional polycrystalline NCM811.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Kei Hosoya, Toshiki Kamidaira, Tetsuya Tsuda, Akihito Imanishi, Masakazu Haruta, Takayuki Doi, Minoru Inaba, Susumu Kuwabata
MATERIALS ADVANCES
(2020)
Article
Electrochemistry
Ziyang Cao, Masakazu Haruta, Takayuki Doi, Minoru Inaba
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Takayuki Doi, Ryo Matsumoto, Takatsugu Endo, Ziyang Cao, Taishin Sato, Masakazu Haruta, Michihiro Hashinokuchi, Yoshifumi Kimura, Minoru Inaba
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Electrochemistry
Ziyang Cao, Masakazu Haruta, Takayuki Doi, Minoru Inaba
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Electrochemistry
Yukihiro Kato, Michihiro Hashinokuchi, Satoshi Hashigami, Kei Yoshimi, Hiroyuki Yoshida, Toru Inagaki, Masakazu Haruta, Takayuki Doi, Minoru Inaba
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Electrochemistry
Masakazu Haruta, Takayuki Doi, Minoru Inaba
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Review
Chemistry, Physical
Takayuki Doi, Michihiro Hashinokuchi, Minoru Inaba
CURRENT OPINION IN ELECTROCHEMISTRY
(2018)
