Article
Chemistry, Multidisciplinary
Yanfei Liu, Jianfei Lei, Ying Chen, Chenming Liang, Jing Ni
Summary: In this study, a tin-doping strategy was used to construct a hierarchical structure of stacked nanowires with exposed (001) facets in Fe2O3 brushes. The tin-doping greatly improved the conductivity of the Sn-doped Fe2O3. Furthermore, the volume changes of the Sn-doped Fe2O3 anodes were limited to approximately 4% vertical expansion and approximately 13% horizontal expansion, resulting in high-rate performance and long-life stability due to the exposed (001) facet and unique hierarchical structure. This doping strategy and the unique hierarchical structures provide inspiration for nanostructure design of functional materials in energy storage.
Article
Chemistry, Physical
Weihua Zhu, Krzysztof Kierzek, Song Wang, Sanxi Li, Rudolf Holze, Xuecheng Chen
Summary: A three-dimensional structure was developed to enhance the performance of iron oxide in lithium ion batteries, utilizing carbon nanotubes and graphene to improve cycling performance and rate capability. This study provides new insights into the design of nanostructures for lithium-ion batteries.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Electrochemistry
E. Thauer, G. S. Zakharova, L. F. Deeg, Q. Zhu, R. Klingeler
Summary: V2O3/C composites were successfully synthesized via a facile hydrothermal thermolysis method, showing excellent electrochemical performance with high specific capacity, great cyclic stability, and high rate capability. The type of carboxylic acid used as a carbon source affects the structure and performance of the V2O3/C composites.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Yi-Ju Chan, Balaraman Vedhanarayanan, Xiaobo Ji, Tsung-Wu Lin
Summary: The ternary composite of MoS2, PANI-rGO, and FEC shows enhanced lithium-ion diffusion and intercalation, as well as improved electron transportation. The addition of 10 wt% FEC into the traditional electrolyte significantly enhances the cyclic stability of the ternary composite, leading to two times higher capacity retention after 400 charge-discharge cycles.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Jiexi Wang, Zhiliang Yan, Guochun Yan, Huajun Guo, Xinhai Li, Zhixing Wang, Xiaomin Wang, Zhewei Yang
Summary: A novel spiral graphene was reported as a promising negative electrode material for lithium ion capacitors, showing high plateau capacity and outstanding rate capability, along with the proposed formation mechanism. Additionally, hierarchically porous carbon derived from the same source demonstrated N, O co-doping property and high surface area, making it an ideal capacitive material.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Pengcheng Mao, Huilin Fan, Guangyu Zhou, Hamidreza Arandiyan, Chang Liu, Gongxu Lan, Yuan Wang, Runguo Zheng, Zhiyuan Wang, Suresh K. Bhargava, Hongyu Sun, Yanguo Liu
Summary: Graphite is widely used in commercial lithium-ion batteries, but its low capacity and low redox potential limit its application in high-performance batteries. Conductive polymers with graphite-like structures are used in electrochemistry, but their Li+ storage mechanism and kinetics are still unclear. We synthesized the conducting polymer Fe-CAT with a conjugated structure and pores, improving its electrochemical performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Jaewon Kim, Min-Seob Kim, Youngseok Lee, Shin-Yeong Kim, Yung-Eun Sung, Seung Hwan Ko
Summary: This study addresses the issue of capacity decrease and short cycle life in silicon anodes in lithium-ion batteries by using a conductive binder, a composite material structure, and introducing a polymer binder and a silver nanowire network to enhance the specific capacity and rate capability of silicon anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Oleg Birkholz, Marc Kamlah
Summary: The hierarchically structured half-cell model for lithium-ion battery electrodes with porous secondary particles has been developed and validated through experiments. The study shows that the rate-limiting factor in this model differs from classical half-cell models, being the combination of electronic conductivity and inner morphology of the secondary particles.
Article
Engineering, Multidisciplinary
Won Il Kim, Jeong Seok Yeon, Hyunyoung Park, Hwi Jung Kim, Min Ju Kim, Jongsoon Kim, Ho Seok Park
Summary: A new cathode material, N,P-rGO/h-MoO2@S, has been developed to address the issues of lithium-sulfur batteries, improving their discharge capacity and cycling stability.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Chandrasekaran Nithya, Jeevan Kumar Reddy Modigunta, Insik In, Soye Kim, Sukumaran Gopukumar
Summary: Hierarchical nanocomposites with surface active bonding features are efficient electrode materials for high-performance Li-/Na-/K-ion batteries. Tuning the physiochemical properties of these nanocomposites has a great impact on their electrochemical performance, attributed to the synergistic effect of different components. In this study, a hierarchical nanocomposite of bismuth sulfide (Bi2S3) nanorod bonded to reduced graphene oxide (rGO) matrix was synthesized and investigated as an anode material for potassium-ion batteries. The nanocomposite exhibited high reversible capacity, long-term cycling stability, and outstanding rate capability. The excellent performance was attributed to the active sites in rGO nanosheets that enhance electrical conductivity of Bi2S3 nanorods and prevent shuttle effect of polysulfide. The proposed phase transformation mechanism and structural stability of Bi2S3 nanorods were confirmed by ex-situ X-ray diffraction and high-resolution transmission electron microscopy analysis respectively. The surface dominated pseudocapacitive K-ion storage also played a major role in improving the electrochemical performance. A K-ion full cell was successfully assembled and showed stable cycling performance after 100 cycles at 1 C rate.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Sainan Zhang, Yingming Xu, Xiaoli Cheng, Shan Gao, Xianfa Zhang, Hui Zhao, Lihua Huo
Summary: In this work, flower-like Mn-based coordination polymers constructed by nanosheets were designed and synthesized, and hierarchical structured MnO/NC composites were successfully obtained through calcination. The composites exhibited a unique yolk-shell structure composed of micro-flowers assembled from nitrogen-doped carbon nanosheets uniformly loaded with MnO nanoparticles as the outer shell and MnO/NC nanoparticle aggregates as the inner core. The composites demonstrated high specific capacity and excellent long cycle stability, attributed to the synergistic effect of the yolk-shell structure and continuous nitrogen-doped carbon coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Xiang-lan Ming, Ruizi Wang, Teng Li, Xixi Wu, Liang-jie Yuan, Yu Zhao
Summary: The study shows that the micro-nano-structured FePO4·2H2O prepared by the turbulent flow cycle method is suitable for use as a cathode material for LiFePO4 in lithium-ion batteries, exhibiting high specific discharge capacity and excellent cycle performance.
Article
Chemistry, Physical
Zehao Zhang, Qiuzhi Huang, Wei Ma, Haibo Li
Summary: Polyhedral carbon@hollowed carbon@SiO2 (PC@HC@SiO2) nanocubes are designed using ZIF-8 as a template for high-performance lithium-ion batteries (LIBs) anode with enhanced capacity and cycling stability. Density functional theory calculation confirms the strong lithium storage capacity of PC@HC@SiO2 due to the interaction between HC and SiO2.
APPLIED SURFACE SCIENCE
(2021)
Review
Materials Science, Multidisciplinary
Noura Zahir, Pierre Magri, Wen Luo, Jean-Jacques Gaumet, Philippe Pierrat
Summary: Graphene quantum dots (GQDs) are nanofragments of graphene with outstanding properties such as high conductivity, high surface area, and good solubility, making them widely applicable in various fields. Recent research focuses on introducing GQDs in batteries, supercapacitors, and micro-supercapacitors, showing excellent electrochemical performance and proposing future optimization strategies.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Y. X. Chen, Y. H. Lin, Y. F. Yuan, W. Lv, M. Zhu, P. F. Du, S. Y. Guo, Q. H. Yang
Summary: Researchers successfully synthesized single-phase ternary CoPSe nanoparticles grown inside cubic hollow carbon nanoboxes (C nanoboxes) with a diameter of 50-120 nm. The CoPSe content is 86.96%. The atomic hybridization of Se and P results in different physicochemical properties. The small particle size of CoPSe improves the reaction kinetics, while the C nanobox enhances the electronic conductivity and effectively locks CoPSe. The abundant void space inside the C nanobox facilitates electrolyte storage, promotes ion diffusion, and accommodates the volume change of CoPSe. These advantages lead to high specific capacity, superior long-term cycling performance, and rate capability in both lithium-ion batteries and sodium-ion batteries.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Jeongyeon Lee, Yoonbin Kim, Soyong Park, Kang Ho Shin, Gun Jang, Min Jun Hwang, Daekyu Kim, Kyung-Ah Min, Ho Seok Park, Byungchan Han, Dennis K. P. Ng, Lawrence Yoon Suk Lee
Summary: In this study, researchers utilized polymeric disodium phthalocyanines (pNaPc) as anode materials for sodium-ion batteries, providing stable coordination sites for Na ions and enhancing stability at high current density. By varying the linker type, two pNaPc anodes with O- (O-pNaPc) and S-linkers (S-pNaPc) were prepared, and their structural and electrochemical properties were investigated. O-pNaPc showed improved redox kinetics and cycle stability, allowing the fabrication of a full cell with high energy density (288 Wh kg(-1)) and high power density (149 W kg(-1)) when coupled with Na3V2(PO4)(2)F-3/C cathode.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Environmental
Guanyao Wang, Qingyun Dou, Peixun Xiong, Qing Liu, Donghyun Min, Ho Seok Park
Summary: Recently, aqueous zinc-ion batteries (AZIBs) have gained attention for their high theoretical capacity, safety, and low cost. However, parasitic reactions and dendritic growth on zinc anodes have limited their practical application. In this study, the addition of supramolecular alpha-cyclodextrin (alpha-CD) to the electrolyte solution was found to regulate zinc ion deposition and suppress the formation of by-products. The alpha-CD additive promoted the epitaxial growth of zinc along a specific plane, leading to improved reversibility of zinc deposition and extended lifespan of the batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Guohao Yang, Chengang Pei, Fang Xu, Ho-Seok Park, Xu Yu, Huan Pang
Summary: The design of pseudocapacitive materials by coupling transition metal compounds with a conductive carbon matrix is crucial for enhancing the performance of supercapacitors. In this study, NiCoSe4-NCNFs were synthesized by carbonizing and selenizing polyacrylonitrile nanofibers, which exhibited excellent capacitive behaviors in 1 mol/L KOH electrolyte due to accelerated ion diffusion, enlarged active surface area, and modified surface chemistry at NiCoSe4/NCNFs interfaces. This work provides a novel strategy for constructing high-performance supercapacitors using transition metal selenides/carbon nanofibers hybrids.
CHINESE CHEMICAL LETTERS
(2023)
Article
Energy & Fuels
Dong Wook Kim, Beum Jin Park, Youngkwon Kim, Ho Seok Park
Summary: In this study, hierarchically structured Cr-doped NiCo-layered double hydroxides (LDHs) nanoplates chemically grown on the surface of nitrogen-doped reduced graphene oxide nanosheets (NiCoCr LDH/N-rGO) were reported for bifunctional electrocatalysts of RZABs. The electrocatalytic activity and kinetics of NiCoCr LDH/N-rGO for both ORR and OER were greatly improved due to Cr doping, resulting in lower overpotential and better Tafel's slope. As a result, the RZAB with NiCoCr LDH/N-rGO catalyst exhibited higher power density and better cycling stability compared to Pt/C+RuO2.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Ho Seok Park, Hwi Jung Kim, Jeong Seok Yeon, Hye Rin Park, Sang Joon Lee, Won Il Kim, Gun Jang
Summary: Recently, the abnormal charge storage mechanism of intercalation pseudocapacitance has attracted significant interest. This study demonstrates the fast and reversible intercalation pseudocapacitance of vanadium-substituted Keggin-type molybdenum-based polyoxometalates (XPMoV) and the support effect of cation exchange on morphological evolution and improved chemical and structural integrity. This research paves the way for the design of fast and reversible intercalation pseudocapacitance of polyoxometalates and the improvement of (electro)chemical and structural integrity through cation exchange chemistry.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Hyeonjeong Lee, Woonghee Choi, Ho Seok Park, Dong Wook Kim
Summary: In this paper, carbon nanofiber (CNF) was introduced as a conductive additive, and the porosity of the electrode was optimized by calendering to achieve a high loading density lithium polymer battery (LPB). A simple dispersion strategy was used to homogeneously disperse nanofiber additives in the electrode, resulting in high electronic conductivity. Calendering with optimized pressing degree improved lithium-ion transport and electron conduction in the LPB. The optimized pressing conditions achieved optimum electrode wettability and contact, leading to high performance of the LPB. Finally, at the optimized pressing degree, 90% cycle retention during 100 cycles and over seven-fold improvement in volumetric energy density were successfully demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yoonbin Kim, Won Il Kim, Hyunyoung Park, Jun Su Kim, Hyungyu Cho, Jeong Seok Yeon, Jongsoon Kim, Young-Jun Kim, Jeongyeon Lee, Ho Seok Park
Summary: In this study, a multifunctional polymeric cobalt phthalocyanine (TCP) material was designed and applied in lithium-sulfur batteries, showing promising performance. The TCP coating on multiwalled carbon nanotubes exhibited cooperative redox mediating and lithiophilic effects, leading to improved conversion reaction kinetics of S cathodes, enhanced utilization efficiency of S, and inhibition of polysulfide shuttling. As a result, the S@TCP/MC cathode achieved high discharge capacity, high-rate capacity, high capacity retention, and high areal capacity.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yanhong Li, Lei Zhang, Hung-Yu Yen, Yucun Zhou, Gun Jang, Songliu Yuan, Jeng-Han Wang, Peixun Xiong, Meilin Liu, Ho Seok Park, Wenwu Li
Summary: This study successfully introduced liquid metallic Ga and highly reactive P into Si to create a cation-mixed disordered lattice and a unique Li storage mechanism. The resulting GaSiP2 electrodes showed high specific capacity and initial Coulombic efficiency, while the graphite-modified GaSiP2 achieved excellent capacity retention and high-rate capacity. The full cells using GaSiP2@C as anode material also exhibited high specific capacity after cycles, demonstrating the potential of GaSiP2 for high-performance LIBs.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Physical
Peixun Xiong, Yingbo Kang, Nan Yao, Xiang Chen, Haiyan Mao, Woo-Sung Jang, David M. Halat, Zhong-Heng Fu, Min-Hyoung Jung, Hu Young Jeong, Young-Min Kim, Jeffrey A. Reimer, Qiang Zhang, Ho Seok Park
Summary: A stable Zn5(CO3)2(OH)6 solid electrolyte interphase (SEI) was formed on the surface of Zn anodes using hybrid electrolytes, resulting in dendrite-free Zn plating/stripping. The Zn5(OH)6(CO3)2-contained SEI exhibited high ionic conductivity and fast Zn2+ migration, enabling the development of stable Zn-ion hybrid capacitors with high performance at various temperatures. The hybrid capacitors showed excellent capacity retention and Coulombic efficiency over a large number of cycles.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Peixun Xiong, Chuyuan Lin, Ying Wei, Jung-Hui Kim, Gun Jang, Keren Dai, Lingxing Zeng, Shuping Huang, Seok Joon Kwon, Sang-Young Lee, Ho Seok Park
Summary: In this study, a charge-transfer complex electrolyte additive, 7,7,8,8-tetracyanoquinodimethane (TCNQ), with high affinity for zinc was used to form a dense and robust interfacial complex layer on the zinc anode, suppressing the activity of H(2)O. The complex layer enabled the formation of a Zn-Zn-(TCNQ)(2) Ohmic contact interface, facilitating rapid ion/electron transport, improving electric field distribution, and preventing direct contact between active H2O and the zinc anode, resulting in a dendrite-free zinc anode and efficient zinc plating/stripping kinetics. As a result, the Zn||Zn symmetrical cell exhibited high plating/stripping reversibility for over 1000 hours at 20 mA cm(-2) and 5 mA h cm(-2), and a high depth of discharge of 43%. Furthermore, the Zn||MnO2 full cell demonstrated a high capacity of 143.3 mA h g(-1) at 2000 mA g(-1) even after 4000 cycles, with a capacity retention of 94.7% after returning to 100 mA g(-1).
ACS ENERGY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Jeong Hee Park, Harpalsinh H. Rana, Jun Su Kim, Jung Woo Hong, Sang Jun Lee, Ho Seok Park
Summary: In this study, an inorganic-organic double network gel electrolyte with high ion conductivity and mechanical integrity was demonstrated. The gel consisted of a silica particle network and a poly-2-hydroxyethylmethacrylate network, with confined 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquids. The gel showed excellent properties attributed to the optimal physical network formed by the silica nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Kang Ho Shin, Donghwan Ji, Jae Min Park, Yun Sang Joe, Ho Seok Park, Jaeyun Kim
Summary: In this study, a structural composite hydrogel electrolyte with high mechanical strength, thermal stability, and the ability to operate in extreme conditions is designed for Zn metal batteries. The electrolyte exhibits high energy densities and uniform Zn deposition, as well as stable performance under mechanical stress and even in boiling and freezing water.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Sang Ha Baek, Jin Suk Byun, Hwi Jung Kim, Sang Joon Lee, Jae Min Park, Peixun Xiong, Yongchul G. Chung, Ho Seok Park
Summary: An organic-inorganic hybrid layer composed of polyoxometalate (POM) and poly(ethylene glycol) dimethyl ether (PEGDME) was demonstrated on the Zn metal surface to improve the reversibility and stability of Zn metal anodes. The POM-PEGDME-coated Zn metal anode achieved a high capacity retention in a battery cell paired with a β-MnO2 cathode, showing the potential of designing synergized organic-inorganic hybrid artificial layers for metal anode protection.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Won Il Kim, Jeong Seok Yeon, Hyunyoung Park, Hwi Jung Kim, Min Ju Kim, Jongsoon Kim, Ho Seok Park
Summary: A new cathode material, N,P-rGO/h-MoO2@S, has been developed to address the issues of lithium-sulfur batteries, improving their discharge capacity and cycling stability.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Electrochemistry
Jae Min Park, Sang Ha Baek, Won Il Kim, Sang Joon Lee, Girish Sambhaji Gund, Ho Seol Park
Summary: Hierarchically structured carbon architecture with large surface area and percolated electron/ion pathways shows promise as a cathode material for lithium-sulfur batteries. However, the synthesis of hierarchical carbonaceous materials is complicated and they often have weak interactions with lithium polysulfides, limiting battery performance. A microwave-assisted synthesis method was used to create carbon nanotubes grown onto steam-activated reduced graphene oxide (sGNC), resulting in a hierarchical carbon structure and nickel nanoparticles that inhibit lithium polysulfides. The sGNC-S cathode exhibited higher initial discharge capacity, better capacity retention, and lower decay rate compared to the sG-S cathode.
ELECTROCHIMICA ACTA
(2023)
