Article
Chemistry, Physical
Siqi Cheng, Wenna Li, Shunhua Xiao, Shuai Zheng, Zhuo Chen, Lizhen Hu, Qing Zhu, Bin Huang, Qingquan Liu, Quanqi Chen
Summary: The calcination temperature significantly affects the physical and electrochemical performance of Na4MnV(PO4)(3)/C composites. The surface area, carbon disorder, Na+ diffusion coefficients, and electrochemical performance are greatly influenced by the calcination temperature. Additionally, the optimal calcination temperature for the composites is found to be 750 degrees C, resulting in the highest capacity, best rate capability, and cyclability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
T. Muthu Muniyandi, S. Balamurugan, N. Naresh, I Prakash, R. Venkatesh, Uday Deshpande, N. Satyanarayana
Summary: Li2FeSiO4/C aerogel was successfully prepared using a high-temperature, high-pressure supercritical drying method, followed by annealing at an optimum temperature. The aerogel showed good electrical conductivity and excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
M. Jayachandran, Helen Annal Therese, T. Vijayakumar
Summary: The Lithium and Manganese-rich layered oxides with the formula Li1.2Ni0.1Mn0.6Co0.1O2 (LMR-NMC) are considered highly promising cathode materials for next-generation lithium-ion batteries due to their high energy densities, low cost, high thermal stability, and environmental safety. This study synthesized LMR-NMC oxides with different morphologies and analyzed their crystal structures and electrochemical properties. The nanoplatelet-like morphology (LMR-NMC-A) exhibited better performance than the cubic-like morphology (LMR-NMC-B). These findings confirm the suitability of nanoplatelet-like LMR-NMC-A as a cathode material for lithium-ion batteries.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Ngo Quy Quyen, To Van Nguyen, Hoang Huu Thang, Pham Manh Thao, Nguyen Van Nghia
Summary: Adding carbon to the surface of P2-type sodium-lithium-manganese oxide material improves its rate capacity and specific capacity, making the carbon-coated NLM@C material a promising cathode material for sodium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Dan Sun, Rongting Guo, Yiju Lv, Wei Li, Mingjun Lu, Qiumei Wei, Zheng Liu, Guo-Cheng Han
Summary: Na2MnPO4F and Ti3C2-carbon quantum dots (CQDs) nanocomposites were prepared and investigated for their structure and electrochemical performance as a lithium-ion battery cathode material. Ti3C2-CQDs were found to improve the cycle performance, rate performance and capacity retention rate of Na2MnPO4F, demonstrating their significance in enhancing the electrochemical performance of polyanionic compounds.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Ceramics
Yulei Sui, Yueying Hao, Xiaoping Zhang, Jiangpeng Li, Gongyu Wen, Shengkui Zhong, Ziwei Zhang, Ling Wu
Summary: This study successfully synthesized V-substituted Na0.67Fe0.5Mn0.5O2 cathode material with improved electrochemical performance, and investigated the effects of V-substitution on its chemical composition, crystal structure and morphology, as well as the modification mechanisms on the enhanced electrochemical properties. The results showed that introducing V ions into the lattice of Na0.67Fe0.5Mn0.5O2 crystals significantly improved its rate capability and cycle stability, mainly due to the enhanced Na+ diffusion rate and structural reversibility.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Haifeng Li, Indrani Roy, Mateusz Starczewski, John Freeland, Jordi Cabana
Summary: A combination of oxygen redox and Mn-based oxides is considered the best option for high-energy-density Li-ion batteries, and the disordered rock-salt Li4Mn2O5 has shown promising capacity and reversibility. In this study, the charge compensation mechanism was investigated through Mn/OK-edge X-ray absorption spectroscopy (XAS). The results provide direct evidence of Mn redox participation during charging and highlight the role of a disordered structure in maintaining reversible redox chemistry for high-energy density cathode materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Yongquan Zhang, Tao Ding, Jingshun Wang, Anquan Yao, Changhai Zhang, Tiandong Zhang, Yue Zhang, Yu Feng, Qingguo Chi
Summary: This research focuses on the development of titanium-doped nano sodium manganese oxides as cathode materials for aqueous rechargeable magnesium ion batteries. The NMTO-5 material exhibits high reversible capacity and excellent electrochemical performance at various current densities. This study demonstrates the promising potential of NMTO-5 as an electrode material.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Electrochemistry
David Kitsche, Florian Strauss, Yushu Tang, Nikolai Bartnick, A-Young Kim, Yuan Ma, Christian Kuebel, Juergen Janek, Torsten Brezesinski
Summary: Inorganic solid-state batteries have limitations compared to conventional liquid electrolyte-based lithium-ion batteries. The search for advanced coatings to protect the cathode materials in solid-state batteries is a challenge. This study successfully modified the surface of a Ni-rich cathode material using a sol-gel chemistry method, resulting in improved protection and performance.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Chol-Jun Yu, Yong-Chol Pak, Chung-Hyok Kim, Jin-Song Kim, Kum-Chol Ri, Kwang-Hyok Ri, Song-Hyok Choe, Stefaan Cottenier
Summary: The study proposes mixed sodium manganese oxides as potential cathode materials for sodium-ion batteries with advantages in electrode voltage, capacity, and sodium-ion diffusion rate, based on first-principles calculations. Through identifying intermediate phases during Na insertion/extraction, the study shows an increase in electrode voltage and specific capacities by mixing due to extending the lower limit of Na content. Furthermore, investigation of sodium-ion diffusion reveals fast migration within the S-shaped tunnel and moderate migration within the small-sized tunnel in these compounds.
JOURNAL OF POWER SOURCES
(2021)
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
Chemistry, Physical
Jun Fan, Li-Li Yu, Gai-Di Fan, Wei-Ling Xu, Juan-Juan Xing, Jing-Tai Zhao
Summary: In this study, 3D porous nano-LiMn2O4 was successfully prepared and showed high performance as an aqueous lithium ion cathode, with high specific capacity, improved rate capability, and capacity retention. With its simple and economical preparation, this porous material may be a promising high-performance cathode material.
JOURNAL OF MATERIOMICS
(2021)
Article
Nanoscience & Nanotechnology
Yuan Zhang, Jiahao Xu, Shaoxiong Fu, Yuhan Bian, Yaping Wang, Li Wang, Guangchuan Liang
Summary: A series of Li2SiO3-coated LiNi0.5Mn1.5O4 materials were prepared to alleviate rapid capacity decay. The coating thickness was controlled by adjusting the amount of TEOS and lithium acetate. The material with an appropriate thickness exhibited improved structural and electrochemical properties, including larger primary particle size and reduced secondary particle agglomeration, enhanced Li+ ion diffusion kinetics, suppressed side reactions and CEI growth, and reduced electrode corrosion and transition metal ion dissolution through interaction with HF.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Xiaoli Yi, Hongyue Luo, Yongmao Zhou, Shihao Feng, Jiexi Wang, Zhixing Wang, Jianguo Duan, Ding Wang, Huajun Guo, Guochun Yan
Summary: Cr-doped Na3V2(PO4)2F3/C material was synthesized and its effects on structure, morphology, and electrochemical performance were investigated. The optimized material Na3V2-xCrx(PO4)2F3/C (x = 0.05) exhibited high initial discharge capacity of 101.9 mAh g-1 at 10 C and retained 68.7% of its capacity after 1000 cycles. The improved performance was attributed to higher crystallinity, improved intrinsic conductivity, and enhanced sodium ion diffusion coefficient due to the doped Cr3+.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Mehmet Emre Cetintasoglu, Ozgul Keles
Summary: The ZrO2 particles were successfully decorated on LiMn2O4 using sonication-assisted sol-gel method, with the distribution ratio on the particle surfaces improved by increasing sonication power. This led to lower charge transfer resistance, higher specific capacity, and improved capacity retention in electrochemical performance of the electrodes.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Shuang Cao, Jiarui Chen, Heng Li, Zhi Li, Changmeng Guo, Gairong Chen, Xiaowei Guo, Xianyou Wang
Summary: Li1.17Na0.02Mn0.54Ni0.13Co0.13O2 (PN-LMNCO) is prepared through surface phase structure controlling and ion doping to address the rapid capacity fading and voltage decay issues of Li-rich Mn-based cathode materials. The introduction of lithium deficiencies induces surface phase transformation and forms an in-situ spinel surface conversion film, effectively inhibiting structure degradation during charge/discharge. Additionally, sodium doping increases spacing between Li layers, improving the rate capacity. The PN-LMNCO exhibits high initial coulombic efficiency (91.2%), retains 94.7% discharge specific capacity after 200 cycles, and maintains good discharge capacity (214 mA h g(-1)) at a high current rate of 5 C. This work is important for the development of high-energy density lithium-ion batteries for electric vehicles.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Wenlong Xia, Mingyu Han, Yufang Chen, Ying Zhou, Hongbo Shu, Yan Chen, Jincang Su, Xianyou Wang
Summary: To improve the electrochemical properties of lithium-sulfur batteries, this study proposes a rational strategy of tuning the d-band of catalysts through the introduction of Fe into in situ grown Ni2P on rGO, resulting in NiFeP/rGO composites. The incorporation of Fe improves the metallic conduction of Ni2P and elevates the d-band center of NiFeP, effectively facilitating charge transfer and weakening the S-S bonds of polysulfides. As a functional interlayer, NiFeP/rGO composites not only promote the interaction between polysulfides and NiFeP but also accelerate the conversion of polysulfides. The high-efficiency NiFeP/rGO electrocatalyst demonstrates the availability of the d-band regulating strategy for lithium-sulfur batteries, providing insights into the redox reaction of LiPSs at the molecular or atom level.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Hui Li, Jiao Peng, Zhenyu Wu, Xiaolin Liu, Peng Liu, Baobao Chang, Xianyou Wang
Summary: A hierarchical SiOx-based anode with double-layer coatings of Sn inner layer and N-doped carbon outer shell was designed to address the limitations of SiOx-based anode materials. The SiOx/C@Sn@NC anode exhibits enhanced initial Coulomb efficiency, higher reversible capacity, and superior long lifespan. The unique double-layer coating structure and multiple active components contribute to the improved electrochemical properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Heng Li, Shuang Cao, Zhi Li, Chao Wu, Jiarui Chen, Xiaowei Guo, Baobao Chang, Xianyou Wang
Summary: Oxygen-anion charge compensation enables lithium-rich manganese-based cathode materials to have higher specific capacity, but it also leads to irreversible oxygen redox and various problems. In this study, an interfacial engineering with sodium hypophosphite is used to modify the cathode material and improve its electrochemical performance. The modification strategy based on the formation of a Li3PO4 protective layer and the generation of oxygen vacancies effectively promotes the kinetic properties of the cathode material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Xiyuan Tao, Li Yang, Jiali Liu, Zihao Zang, Peng Zeng, Changfei Zou, Lingguang Yi, Xiaoyi Chen, Xiaolin Liu, Xianyou Wang
Summary: Garnet-type Li7La3Zr2O12 (LLZO) is a solid-state electrolyte with high Li+ conductivity and stability. Ga-LLZO, in particular, achieves high ionic conductivity and can be prepared using a rapid ultra-high-temperature sintering method. The Ga-LLZO ceramic electrolyte exhibits high relative density, good ionic conductivity, and excellent electrochemical stability and interfacial compatibility against Li metal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Hechen Li, Yiwen Guo, Yuanhua Chen, Nengshuang Gao, Ruicong Sun, Yachun Lu, Quanqi Chen
Summary: The full-concentration gradient LiNi0.9Co0.083Mn0.017O2 (CG-LNCM) was prepared and compared to concentration-constant LiNi0.9Co0.083Mn0.017O2 (CC-LNCM) in terms of electrochemical performance. CG-LNCM exhibited lower cation mixing and larger Li+ diffusion coefficients, leading to higher capacity and better rate capability and cyclability compared to CC-LNCM. The significantly improved electrochemical performance of CG-LNCM is attributed to its concentration-gradient microstructure and the composition distribution of concentration-gradient LiNi0.9Co0.083Mn0.017O2.
Article
Chemistry, Physical
Juan Yang, Jiao Peng, Yu Lei, Junqing Zeng, Guang Li, Yongqiang Shen, Baobao Chang, Liping Zheng, Xianyou Wang
Summary: A solvent-free mechanochemical method was used to prepare a calcium carbide-derived porous carbon (CCDPC) composite with polyaniline (PANI). The CCDPC/PANI composite showed a significantly improved specific capacitance and energy density compared to pure CCDPC, as well as good capacitance retention after cycling tests. This study provides important insights for enhancing the electrochemical performance of high-performance supercapacitors.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Changfei Zou, Zihao Zang, Xiyuan Tao, Lingguang Yi, Xiaoyi Chen, Xiaoyan Zhang, Li Yang, Xianhu Liu, Xianyou Wang
Summary: In this study, a thin layer of Li1.3Al0.3Ti1.7(PO4)(3) was used as an interface coating in lithium-ion batteries to improve the stability between the cathode and solid-state electrolyte. The nanoscale coating not only enhances lithium ion transport but also alleviates interfacial problems, leading to better capacity retention.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jiarui Chen, Shuang Cao, Zhi Li, Heng Li, Changmeng Guo, Ruijuan Wang, Lei Wu, Yixu Zhang, Yansong Bai, Xianyou Wang
Summary: In this study, homogeneous Li2ZrO3 (LZO) was successfully coated on the surface of Li1.2Mn0.54Ni0.13Co0.13O2 (LRO) by molten salt-assisted sintering technology. The as-prepared LRO@LZO composites have improved cycling performance due to the good chemical and electrochemical stability of LZO. Additionally, Li2ZrO3 acts as an excellent lithium-ion conductor, leading to increased lithium-ion transfer rate and improved rate capacity of LRO. Therefore, this study provides a new solution to enhance the structure stability and electrochemical performance of lithium-rich manganese-based cathode materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Lizhen Hu, Nengshuang Gao, Bin Huang, Hesheng Yu, Quanqi Chen
Summary: In this study, a three-dimensional conductive network structure with carbon and 3DG coating VPO4 was successfully built via hydrothermal method and high-temperature annealing. The composite with 20 wt.% 3DG showed the best cycling and rate performance among all samples, thanks to the inhibitory effect on particle growth and aggregation as well as the improved conductivity and volume buffering capability.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Xi Zhou, Xuelin Huang, Guang Li, Peng Zeng, Xiaolin Liu, Hong Liu, Manfang Chen, Xianyou Wang
Summary: A novel metal-organic framework (MOF) derivative called ZnCoFe-NC was designed and synthesized as a sulfur host for Li-S batteries. Its special hollow polyhedral structure provides physical trapping ability and chemisorption space for lithium polysulfides (LiPSs). The Zn, Co, Fe, and N doping not only have excellent chemisorption ability, but also high electrocatalytic activity, which accelerates the transformation of LiPSs and reduces their dissolution, improving the performance of Li-S batteries significantly.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Yu Lei, Guang Li, Juan Yang, Feng Zhang, Yongqiang Shen, Xiaoyan Zhang, Xianyou Wang
Summary: As a promising alternative to lithium-ion batteries, zinc-air batteries are recognized as a novel type of clean and environmentally friendlyenergy storage and conversion technology. In this study, a high-efficiency and cheap ORR catalyst, Fe3O4/Fe-N (x) dual catalytic active center (Fe-N-CS), was designed and prepared to overcome the limitation of low current density and large electrode polarization in the air cathode. The Fe-N-CS exhibited excellent ORR performance, surpassing Pt/C catalysts in terms of half-wave potential, onset potential, and stability.
Article
Materials Science, Multidisciplinary
Ruicong Sun, Yiwen Guo, Yuanhua Chen, Nengshuang Gao, Hechen Li, Qingquan Liu, Bin Huang, Quanqi Chen
Summary: In order to develop high-energy density and inexpensive lithium-ion batteries, it is critical to search for inexpensive cathode materials with high capacity and operating voltage. In this study, a cobalt-free Ni-based ternary material LiNi0.9Fe0.05Al0.05O2 was prepared using a modified rheological phase reaction method. LiNi0.9Fe0.05Al0.05O2 exhibits a high discharge capacity of 195 mAh g(-1) at 0.1C, as well as better rate capability and cyclability. LiNi0.9Fe0.05Al0.05O2 is competitive among Ni-based cathode materials considering both cost and electrochemical performance.
Article
Chemistry, Physical
Heng Li, Zhi Li, Jiali Liu, Shuang Cao, Jiarui Chen, Hui Hu, Changmeng Guo, Xiaoyan Zhang, Xianyou Wang
Summary: The treatment of ammonium niobium oxalate can effectively improve the electrochemical performance of Co-free Li-rich layered oxides by creating oxygen vacancies and doping Nb5+ on the surface, leading to enhanced cycling stability and rate performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Guang Li, Kuang Sheng, Yu Lei, Feng Zhang, Juan Yang, Tianjing Wu, Liping Zheng, Xianyou Wang
Summary: Transition metal sulfides are considered as candidate oxygen redox catalysts due to their high catalytic activity and reversible redox performance. This study successfully synthesized Co9S8-FeCoS2 two-phase nanoparticles anchored in carbon spheres, which exhibited excellent catalytic performance and stability. This work provides an important approach to prepare highly efficient and stable dual-transition metal sulfide-modified carbon-based catalysts for oxygen reduction and oxygen evolution reactions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)