Article
Energy & Fuels
Xia Lu, Zhen Chen, Qiang Yu, Wei Zhu, Shuting Li, Lei Han, Jiali Yuan, Shutong Li, Yize Wu, Ze Lv, Bangyao Chen, Hongjun You
Summary: In this study, a modified cathode material PbO2-CS-F was prepared and characterized for its microstructure and phase composition. The electrochemical activity and battery performance were analyzed. The results showed that PbO2-CS-F cathode material exhibited superior performance among a series of PbO2 cathode materials, with smaller grain size, higher oxygen evolution potential, higher exchange current density, smaller charge transfer resistance, and higher chemical activity, resulting in longer cycle life and higher specific capacity for lead-acid batteries.
Article
Chemistry, Physical
Wenji Ruan, Xiangling Yue, Jiupai Ni, Deti Xie, Chengsheng Ni
Summary: The study indicates that Fe3+ doping can enhance the electrical conductivity of oxide cathodes in air, but may affect the stability of the material structure in reducing atmosphere. The electric conductivity under Fe3+ doping is mainly attributed to the interaction between Ti4+-O-Ti3+ and Fe3+-O-Fe2+. Excessive Fe3+ doping may lead to phase transformation and interface issues.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Dongdong Ji, Zheng Liu, Bailing Jiang, Bo Sun, Xue Zhang
Summary: This study investigates the physicochemical properties of PbO2 deposits at different temperatures. The results show that deposits formed at low temperature have higher discharge capacity and improved physicochemical properties, but the cycling performance of batteries is worse at low temperature.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Roberto Luigi Oliveri, Maria Grazia Insinga, Simone Pisana, Bernardo Patella, Giuseppe Aiello, Rosalinda Inguanta
Summary: The study aims to enhance the performance of lead-acid batteries by replacing traditional plates with nanostructured electrodes for improved stability, increased capacity, and larger active surface. Nanostructured electrodes offer wider active surface area leading to higher specific energy. The research also investigates the performance of lead-acid batteries with nanostructured electrodes under different temperatures.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Jinpeng Bao, Nan Lin, Yuanyuan Dan, Weiqi Gao, Zhiqiang Liu, Haibo Lin
Summary: This study successfully prepared SiO2+PbO2 powders with high specific surface area and good electrochemical performance through a simple anode co-electrodeposition method, which can enhance the energy density and stability of the positive electrode in lead-carbon batteries. By adding this additive, outstanding ion transfer channels are built inside the positive active material, leading to an increase in energy density by 12% and enhancement in stability by 10% after 3000 cycles in HRPSoC compared to batteries without this additive.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Shehab E. Ali, Wojciech Olszewski, Andrea Sorrentino, Carlo Marini, Arefehsadat Kazzazi, Nina Laszczynski, Agnese Birrozzi, Angelo Mullaliu, Stefano Passerini, Dino Tonti, Laura Simonelli
Summary: X-ray absorption spectroscopy was used to characterize the local structural and electronical transformations occurring in Li- and Mn-rich Li[Li0.2Ni0.6Mn0.56Co0.08]O-2 cathode material during the first charge and discharge cycle. The irreversible spinel formation at the expense of the cycling layered phase, induced by Ni oxidation, has been quantified and localized. The charge balance for all elements along the first charging cycle confirmed reversible oxygen oxidation, providing a basis for modeling aimed at controlling the structure evolution.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Zhengyang Chen, Jing Cao, Jiajia Yu, Ling An, Lei Wu, Shengquan Zhou, Yali Yang
Summary: This paper investigates the influence of tartaric acid on the formation of the negative plate in lead acid batteries. Tartaric acid can significantly improve the stability and efficiency of the battery, with higher electrochemical reactivity and longer high-rate partial state of charge cycle life.
Article
Chemistry, Physical
Yanan Jiao, Jian Qin, Hirbod Maleki Kheimeh Sari, Dejun Li, Xifei Li, Xueliang Sun
Summary: Combining balanced CO2 emissions with energy storage technologies is an effective way to alleviate global warming, and the Li-CO2 electrochemical system, with its promising energy storage and CO2 capture strategy, is attracting attention. However, the system is still in early stages of development and faces challenges due to slow kinetics of the CO2 electrochemical reaction.
ENERGY STORAGE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Min Yang, Licai Fu, Jiajun Zhu, Wulin Yang, Lingping Zhou
Summary: The poor conductivity between Ta-doped Li7La3Zr2O12 (LLZTO) solid electrolyte and electrode limits large current discharge, but simple heat treatment can decrease the interfacial resistance and improve discharge specific energy. High temperature element interdiffusion of Cl- and O2- leads to the formation of specific reaction products, which help reduce the interfacial resistance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Meng Wang, Qiang Yu, Shuting Li, Zhen Chen, Wei Zhu, Lei Han, Huixi Li, Lian Ren, Linxia Li, Xia Lu, Jiali Yuan, Shutong Li, Yize Wu
Summary: A novel three-dimensional hierarchical porous lead-carbon composite (Nano-PbO@3DCSHPAC) derived from corn stover biomass is prepared to address the problems associated with high hydrogen evolution reaction (HER) occurrence and irreversible sulfation of the negative electrode. The addition of PbO in the Nano-PbO@3DCSHPAC composite effectively inhibits HER and acts as a nucleus, refining the sponge Pb grains and maintaining the high electrochemical active area of the electrode. The Nano-PbO@3DCSHPAC composite with high porosity and specific surface area provides good ion channels and inhibits irreversible sulfation, resulting in improved battery discharge capacity and cycling life.
Article
Chemistry, Physical
Hyung Gi Kim, Yong Joon Park
Summary: Lithia-based cathodes have high capacity but are susceptible to electrolyte reactions, leading to decreased electrochemical performance. Developing a MgF2 coating through in situ electrochemical reactions effectively protects the cathode, with the thin coating not requiring high-temperature treatment, thereby improving the electrochemical performance. The use of an inorganic MgF2 coating derived from a Mg salt has shown superior electrochemical performance for lithia-based cathodes compared to conventional electrolytes with or without a VC additive.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yiming Dai, Xuyang Liu, Wangyan Wu, Ying Huang, Tengrui Wang, Zhenyou Song, Renyuan Zhang, Wei Luo
Summary: Anhydrous copper(II) fluoride shows high specific capacity and energy density, but its development as a cathode material is hindered by the dissolution of copper. By using a fluorinated high-concentration electrolyte, the reversibility of the copper fluoride electrode is enabled. The electrolyte engineering strategy allows for the utilization of copper(II) fluoride as a high-capacity cathode material for lithium batteries.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Shogo Komagata, Yuichi Itou, Hiroki Kondo
Summary: This study investigates the effects of charge/discharge cycling on the thermal stability of a high-Ni cathode material, LiNi0.8Co0.1Mn0.1O2. The results show that the bulk structure of the cathode remains unchanged, while a stable rock-salt structure is formed in the surface layer. The formation of the rock-salt layer significantly reduces the heat generation at the lowest temperature, enhancing the thermal stability of the high-Ni cathode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Haoru Wu, Likun Zhu, Yongzhu Fu
Summary: Molecular organosulfides are a type of cathode materials that possess high capacity and sustainability. This study reports a strategy to prevent their dissolution by anchoring 1,2-benzenedithiolate molecule and forming organosulfide-metal complex in situ in the cathode of a lithium battery. The effectiveness of this strategy is demonstrated and the redox mechanism is proposed.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Sadhasivam Thangarasu, Hoon Seo, Ho-Young Jung
Summary: The study introduces a new strategy for enhancing the performance of polyester separator in Lead-Acid Batteries, by developing a hybrid separator with higher electrolyte uptake and improved electrochemical properties. The CC-Polyester exhibits excellent stability and performance in LAB systems, showing potential for improving battery performance through enhanced adhesion and reaction between separator and electrode surfaces.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Fangzhou Song, Takayuki Yamamoto, Takeshi Yabutsuka, Takeshi Yao, Shigeomi Takai
Summary: Lithium ion-conductive composites were prepared by dispersing LLTO particles in a LAGP matrix, leading to increased electrical conductivity. Lithium ions were found to be the predominant charge carrier in this composite electrolyte.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Fangzhou Song, Harunobu Onishi, Wen-Jauh Chen, Takeshi Yabutsuka, Takeshi Yao, Shigeomi Takai
Summary: In this study, TEM experiments were conducted on LaPO4-dispersed LATP composite to investigate the microstructure and compositions of the dispersed LaPO4 particles and surrounding LATP matrix. The results revealed an intimate contact between LaPO4 particle and the LATP matrix, suggesting the formation of a space charge layer at the interface to enhance conductivity.
Article
Chemistry, Physical
Fangzhou Song, Masayoshi Uematsu, Takeshi Yabutsuka, Takeshi Yao, Shigeomi Takai
Summary: LATP-based composite electrolytes were prepared by sintering mixtures of LATP precursor and La2O3 nano-powder, which showed that La2O3 could react with LATP to form dispersed LaPO4 particles. The room temperature conductivity initially increased with La2O3 addition but decreased above 6 wt.%, and the activation energy of conductivity remained relatively unchanged. Comparing with LATP-LLTO system, the LATP-La2O3 system achieved fine dispersion of LaPO4 particles despite a slight reduction in conductivity due to unidentified impurities.
Article
Electrochemistry
Shigeomi Takai, Ryo Takemoto, Takeshi Yabutsuka, Takeshi Yao
Summary: To investigate the influence of defect structure on oxide ion conduction properties in CaWO4-based system, cesium and lanthanum ions were doped into CaWO4. The results showed that the structure and phase transition of the solid solution varied in different composition regions, which affected the conductivity. The study revealed that high-temperature oxide ion conduction was attributed to both oxide ion vacancies and interstitials.
Article
Chemistry, Physical
Yuya Yamane, Takeshi Yabutsuka, Yusuke Takaoka, Chihiro Ishizaki, Shigeomi Takai, Shunsuke Fujibayashi
Summary: The study aimed to enhance the apatite-forming ability of 50% carbon fiber-polyetheretherketone composite (50C-PEEK) as artificial bone materials, achieving rapid formation of apatite phase in simulated body fluid through sulfuric acid treatment, oxygen plasma treatment, and calcium phosphate nuclei precipitation in modified-SBF solution.
Article
Chemistry, Physical
Fangzhou Song, Heng Chen, Hirotoshi Hayashida, Tetsuya Kai, Takenao Shinohara, Takeshi Yabutsuka, Takeshi Yao, Shigeomi Takai
Summary: Lithium tracer diffusion coefficients were measured in LATP and LATP-LaPO4 composite solid electrolytes, indicating that bulk diffusion becomes the dominant mechanism at 300℃ to 500℃.
SOLID STATE IONICS
(2022)
Article
Multidisciplinary Sciences
Yusuke Takaoka, Shunsuke Fujibayashi, Takeshi Yabutsuka, Yuya Yamane, Chihiro Ishizaki, Koji Goto, Bungo Otsuki, Toshiyuki Kawai, Takayoshi Shimizu, Yaichiro Okuzu, Kazutaka Masamoto, Yu Shimizu, Makoto Hayashi, Norimasa Ikeda, Shuichi Matsuda
Summary: Sulfonation and applications of amorphous calcium phosphate can enhance the bioactivity of polyetheretherketone (PEEK). The precipitation of amorphous calcium phosphate after sulfonation (AN-treatment) can further improve the bone-bonding strength of PEEK. The study found that CPEEK subjected to AN-treatment had better bone-bonding strength at the interface with the base material compared to untreated CPEEK. AN-treatment promoted the formation of new bone, resulting in enhanced bonding between CPEEK and bone tissue.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Hayato Nakaishi, Takeshi Yabutsuka, Takeshi Yao, Shinji Kitao, Makoto Seto, Wen-Jauh Chen, Yuta Shimonishi, Shuhei Yoshida, Shigeomi Takai
Summary: We characterized a mechanically alloyed (Fe2O3)1-x(Al2O3)x solid solution with corundum-type structure using TEM, EXAFS, and Mössbauer spectroscopy. The results showed the homogeneity of cation distribution and the variation of magnetic property with composition. HR-TEM revealed that the crystallite size of the solid solution is 10-20 nm and the lattice spacing is consistent with Vegard's law. EXAFS measurements indicated a monotonic decrease in Fe-Fe distance with aluminum substitution, while Fe-O was not significantly altered. Mössbauer spectroscopy showed a gradual change in spectra from sextet peaks at x = 0 to doublet with increasing Al2O3 concentration up to x = 0.67, suggesting homogeneous substitution of aluminum ions in the corundum-type structure.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Kenshiro Takaishi, Shigeomi Takai, Takeshi Yabutsuka
Summary: Octacalcium phosphate (OCP) coating was formed on the surface of Mg-Al-Zn-Ca alloy (AZX612) through anodic oxidation and subsequent immersion in a supersaturated aqueous solution containing phosphate and calcium ion. The formed OCP layer consists of an inner layer of fine crystallites and an outer layer of large crystallites, and the inner layer remains on the alloy even after ultrasonication process. AZX612 treated with both anodic oxidation and subsequent OCP coating process exhibits higher corrosion resistance than those treated with only anodic oxidation.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Takeshi Yabutsuka, Masaya Yamamoto, Shigeomi Takai
Summary: This study aimed to establish enzyme immobilization technology using maghemite/hydroxyapatite composite particles and investigate the enzyme adsorption characteristics. The results showed that the enzyme's isoelectric point and the solution's pH influenced the immobilization. The interaction between HA on the composite particles and the adsorbed enzymes was strongest when pH-pI was 1-2.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Electrochemistry
Jian Kang, Shigeomi Takai, Takeshi Yabutsuka, Takeshi Yao
Summary: The structural variation of NCM-811 during lithium extraction to the high-voltage region shows the generation and transformation between H3 and H2 phases. The Ni interlayer distance decreases with relaxation time, possibly due to an increase in the valence of Ni.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
