Article
Acoustics
Bhaskar J. Choudhury, Vijayanand S. Moholkar
Summary: In this study, a ternary nanocomposite with commercial-level mass loading was developed for supercapacitors, demonstrating high capacitive performance and cycle life. The nanocomposite was synthesized using a facile ultrasound-assisted one-pot method, resulting in a porous ternary structure with efficient ion diffusion channels and high electrochemically active surface area.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Physical
Wei Zheng, Joseph Halim, ZhengMing Sun, Johanna Rosen, Michel W. Barsoum
Summary: This study tested an AASC with Ti3C2Tz MXene as the negative electrode and a mixture of manganese oxides as the positive electrode, using a saturated lithium chloride electrolyte. The device demonstrated high energy and power densities, slow self-discharge rates, excellent rate capability, and cycling stability, making it a promising option for environmentally friendly AASCs with commercial mass loadings.
ENERGY STORAGE MATERIALS
(2021)
Article
Materials Science, Paper & Wood
Jincy Parayangattil Jyothibasu, Ruei-Hong Wang, Kenneth Ong, Juping Hillary Lin Ong, Rong-Ho Lee
Summary: Nanostructured manganese dioxide (MnO2) was homogeneously deposited on a regenerated cellulose/functionalized CNT (f-CNT) matrix through a direct redox reaction between potassium permanganate and carbon nanotubes (CNTs) in an acidic medium. The resulting cellulose/f-CNT/MnO2 composite films showed outstanding electrochemical performance as freestanding electrodes for supercapacitors, with a maximal areal capacitance of 7956 mF cm(-2) achieved for a high MnO2 content composite. The symmetric supercapacitor assembled using the cellulose/f-CNT/MnO2 composite film exhibited high capacitance, energy density, and power density. The simple and environmentally friendly synthetic procedure can be readily scaled up for bulk synthesis.
Article
Chemistry, Physical
Qianlan Ke, Yuhui Zhang, Yuanheng Fu, Chenxi Yang, Fan Wu, Zhongxiu Li, Yi Wei, Kun Zhang
Summary: In this study, we investigated the electrochemical performance of a carbon fabric-based supercapacitor coated with MnOx@rGO nanohybrids using a simple one-step hydrothermal method. The effect of the mass ratio of MnOx to rGO on the electrochemical properties was studied. It was found that the supercapacitor with a mass ratio of 0.8:1 for MnO@rGO exhibited a specific capacitance of 831.25 mF cm(-2) at a current density of 0.1 mA cm(-2) when loaded with 5.40 mg cm(-2) of MnO@rGO nanohybrids on carbon fabric. Furthermore, it showed a long-term cycling capacitance retention of 97.2% after 10,000 charge-discharge cycles at a current density of 0.4 mA cm(-2). The high electrochemical performance is speculated to be attributed to the strong interfacial bonding between the hierarchical architecture of MnO@rGO nanohybrids and carbon fabric.
Article
Energy & Fuels
Yuan Niu, Maoqiang Guo, Yuting Zhang, Jie Yang, Xin Zhang, Yige Gao, Xianli Wang, Lizhi Sheng, Junyou Shi
Summary: A new heteroatom-doped hierarchical porous carbon material, LPC-2, was developed in this study with excellent frequency response and high energy density. The material was designed through heteroatom self-doping and architecture design integration, using longan shell and KOH as precursors. LPC-2 exhibited superior charge and ion transport properties at high mass loadings.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Pasinee Panith, Pichitchai Butnoi, Varol Intasanta
Summary: This study introduces a novel hybrid faradaic structure to improve the performance of biomass-derived carbon-based supercapacitors (SCs). By carefully designing the organic-inorganic hybrid composition, nanostructures, porosity, surface area, and active redox reactions, pure lignin carbon nanofibers (LCNFs) incorporated with flower-like, multi-metal, and intrinsically capacitive nanoparticles were fabricated as flexible and binder-free electrodes for SCs. The experimental results demonstrate that the specific capacitance of the SCs can be significantly increased and the cycling stability can be improved by adding nanoparticles and using a mixed electrolyte.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Hangtian Zhu, Yafei An, Minjie Shi, Ziqi Li, Nianting Chen, Cheng Yang, Peng Xiao
Summary: In this study, a novel MnO2/PNC electrode with superior electrochemical performance in IL electrolyte was developed, showcasing large specific capacitance, remarkable rate capability, and favorable electrochemical kinetics.
Article
Chemistry, Physical
Taehan Yeo, Byungseok Seo, Jaeho Lee, Seounghyun Park, Kyungmin Kim, Wonjoon Choi
Summary: This study presents a new synthesis technique - ultrafast extreme thermal-electrical wave (UTEW), for preparing unconventional arranged and morphology trapped composite electrodes. The technology allows for the fabrication of unique volcano-shaped core-shell silver-manganese oxide branches anchored on carbon fibers, showing excellent performance in electrochemical applications.
Article
Chemistry, Multidisciplinary
D. M. El-Gendy, N. K. Allam, E. N. El Sawy
Summary: In this paper, novel adenine/sulfanilamide functionalized molybdenum oxide (FMO) nanoflakes were synthesized, and their structural, optical and electrochemical properties were investigated. The FMO electrodes exhibited high specific capacitance, good cycle stability, and superior energy and power densities. Thus, FMO has significant potential as an electrode material for high-performance electrochemical supercapacitors.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Li-zhi Sheng, Yun-yun Zhao, Bao-quan Hou, Zhen-peng Xiao, Li-li Jiang, Zhuang-jun Fan
Summary: A porous carbon material (NPCM) with high N content was prepared by a simple activation-doping process and used as a high-performance supercapacitor electrode material. The NPCM exhibited high electrical conductivity, large ion-accessible surface area, and fast ion transport ability, leading to high specific capacitance and capacitance density. Assembled symmetric supercapacitors using NPCM showed high specific energy and power densities, indicating promising applications in various fields.
NEW CARBON MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Sheng Zhu, Fei Zhang, Hai-Gang Lu, Jian Sheng, Lina Wang, Si-Dian Li, Gaoyi Han, Yan Li
Summary: A novel structured graphene, named flash nitrogen-doped graphene (FNG), has been synthesized using a solvent-and catalyst-free flash Joule heating method. FNG features high graphitization with a turbostratic structure and exhibits high surface-area-normalized capacitance and exceptional rate capability. It also demonstrates desirable cyclic stability, making it a promising candidate for high-performance supercapacitors.
ACS MATERIALS LETTERS
(2022)
Review
Chemistry, Inorganic & Nuclear
Manickam Minakshi, Kethaki Wickramaarachchi
Summary: An electrochemical asymmetric capacitor is a device with different electrodes that has high power and long cycle life. By using novel materials processing, the energy density and power density of the device can be improved. Manganese di-oxide (MnO2) and activated carbon (AC) are paired as positive and negative electrodes, and simple modifications to the synthesis can catalyze changes in storage properties.
PROGRESS IN SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Eduart Gutierrez-Pineda, Ahmed Subrati, Maria Jose Rodriguez-Presa, Claudio A. Gervasi, Sergio E. Moya
Summary: This paper presents an electrochemical exfoliation method for producing graphene oxide and characterizes it using electrochemical techniques. The electrochemical behavior of the produced graphene oxide was studied through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Additionally, various characterization techniques such as X ray Photoelectronic Spectroscopy (XPS), Raman spectroscopy, Transmission Electron Microscopy (TEM), and Atomic Force Microscopy (AFM) were employed to analyze the structural and chemical properties of the exfoliated graphene oxide. The results demonstrate that the electrochemical exfoliation method allows for the production of graphene oxide materials with varying degrees of oxidation, defect density, and crystallite size.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Energy & Fuels
Maheshwaran Girirajan, Venkatesan Arumugam, Suganya Subramaniyan, Ramesh Prabhu Manimuthu, Sudhahar Sakkarapani
Summary: This study investigates the use of a bismuthene/antimonene nanocomposite as a supercapacitor electrode material, demonstrating excellent electrochemical performance and high energy density. The composite electrode shows a high specific capacity, outstanding cycling stability, and practical utilization.
Article
Chemistry, Multidisciplinary
Shiqi Lin, Jie Tang, Kun Zhang, Youhu Chen, Runsheng Gao, Hang Yin, Lu-Chang Qin
Summary: The relationship between oxygen-containing functional groups in graphene and supercapacitor stability was investigated. Different oxygenic functional groups were introduced in reduced graphene oxide (rGO) by varying the reduction time. The study revealed that longer reduction time resulted in restoration of the sp(2) structure in the rGO sheet, increased crystallinity, and removal of oxygenic functional groups. The presence of oxygenic functional groups contributed to pseudocapacitance and larger specific capacitance, but also led to poorer rate performance and durability. By extending the reduction time, the oxygenic functional groups can be effectively removed and the stability of rGO can be improved.
NANOSCALE ADVANCES
(2023)
Article
Nanoscience & Nanotechnology
Zengming Qin, Yu Song, Duo Yang, Ming-Yue Zhang, Hua-Yu Shi, Cuicui Li, Xiaoqi Sun, Xiao-Xia Liu
Summary: A new Zn-MnO2 hybrid battery using Al3+ in the sulfate-based electrolyte is proposed, which exhibits excellent electrochemical performance and cycle life while avoiding environmental hazards and corrosion of the Zn anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yaozhi Liu, Zengming Qin, Xianpeng Yang, Xiaoqi Sun
Summary: A negatively charged porous carbon host was proposed for manganese oxide to ensure stable cycling in rechargeable aqueous zinc batteries. The mechanism studies demonstrated the reversible deposition of Mn2+ back to the cathode and the preserved active species for energy storage. The composite cathode achieved an ultra-long life over 11,000 cycles at 2 A g(-1) in the absence of Mn2+ additives.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Han Yan, Xinjian Mu, Yu Song, Zengming Qin, Di Guo, Xiaoqi Sun, Xiao-Xia Liu
Summary: A simple protonation strategy was proposed to activate the redox of PANI cathode, enhancing its active sites and conductivity. The results showed that this strategy achieved excellent performance in aqueous Zn batteries.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Cuicui Li, Wanlong Wu, Yaozhi Liu, Xianpeng Yang, Zengming Qin, Zhongqiu Jia, Xiaoqi Sun
Summary: Rechargeable Mg-ion batteries face the challenge of lacking cathode materials with high operating potential and considerable capacity. This study proposes a co-insertion strategy and designs a polyanion cathode, Li3V2(PO4)(3), with high redox potential. The co-insertion of Li+ cations enhances the cation diffusion coefficients and improves the capacity. The Li3V2(PO4)(3) cathode exhibits high capacity and good capacity retention at room temperature.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Yaozhi Liu, Zengming Qin, Xianpeng Yang, Jie Liu, Xiao-Xia Liu, Xiaoqi Sun
Summary: In aqueous zinc batteries, the two-electron process of MnO2 cathode materials is achieved by co-deposition with zinc hydrophosphate, leading to increased capacity and voltage. The zinc hydrophosphate releases protons to enhance the reduction and dissolution of MnO2, as confirmed by theoretical calculations and experimental results.
ACS ENERGY LETTERS
(2022)
Article
Engineering, Environmental
Xianpeng Yang, Wanlong Wu, Yaozhi Liu, Xiao-Xia Liu, Xiaoqi Sun
Summary: Researchers fabricate an artificial protection layer of carrageenan on the zinc electrode, which effectively addresses the issues of dendrite growth and side reactions, improving the electrochemical performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Lu Lin, Zirui Lin, Jiaqi Zhu, Kuo Wang, Wanlong Wu, Tong Qiu, Xiaoqi Sun
Summary: In this study, a semi-conductive piperazine-linked quinone material was synthesized for zinc batteries, showing excellent electrical conductivity and stable cycling performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Kuo Wang, Tong Qiu, Lu Lin, Xiao-Xia Liu, Xiaoqi Sun
Summary: This study introduces a novel interface stabilizer, 2,3,4,5-tetrahydrothiophene-1,1-dioxide (TD), in the 3 m ZnSO4 electrolyte for zinc batteries. The adsorption of TD molecules on Zn surface inhibits the spontaneous chemical corrosions and ensures a homogeneous electrode surface. The stable solid-electrolyte interface (SEI) induced by the adsorbed TD further suppresses parasitic reactions and leads to uniform Zn deposition.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Yaozhi Liu, Zengming Qin, Xianpeng Yang, Jie Liu, Xiao-Xia Liu, Xiaoqi Sun
Summary: The cycling stability of MnO2 cathodes in aqueous zinc batteries is highly dependent on the presence of Mn2+ additives in the electrolyte. However, this study demonstrates a voltage-induced lattice contraction mechanism that enables stable cycling of a-MnO2 in Mn2+-free electrolytes. The accumulation of electrochemically inactive parts is found to be the main cause of capacity decay during cycling at a top voltage cut-off of 1.8 V. By extending the voltage limit to 2.2 V and implementing a voltage hold process during the initial charge, the inactive parts are activated to undergo reversible two-electron transfer reactions. The high voltage induces lattice contraction, stabilizes structural water, enhances Mn release, and generates more oxygen vacancies, weakening the Mn binding in the lattice. As a result, MnO2 achieves a capacity of 323 mAh g 1 with 94.6% retention over 300 cycles (>1800 h) at 0.1 A g 1 in a Mn2+-free electrolyte of 3 M ZnSO4. This work provides an effective approach to achieve stable cycling of MnO2 cathodes in zinc batteries.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yaozhi Liu, Kuo Wang, Xianpeng Yang, Jie Liu, Xiao-Xia Liu, Xiaoqi Sun
Summary: Researchers proposed a structural engineering strategy to enhance the capacity contribution of MnO2 in aqueous Zn batteries, achieving stable cycling in Mn2+-free electrolytes. By compositing with MoO3, the MnO2/MoO3 cathode showed improved stability and capacity retention in ZnSO4 electrolyte. The mass ratios between materials undergoing reversible two-electron and one-electron transfer reactions significantly increased in the MnO2/MoO3 composite material compared to pure MnO2.
Article
Chemistry, Multidisciplinary
Kuo Wang, Tong Qiu, Lu Lin, Fangming Liu, Jiaqi Zhu, Xiao-Xia Liu, Xiaoqi Sun
Summary: In aqueous zinc batteries, the Zn metal anode undergoes dendritic growth and side reactions. The addition of ethylene carbonate (EC) as an additive can modify the interface environment and inhibit side reactions. EC can adsorb on the Zn surface from the ZnSO4 electrolyte, and Zn2+ preferentially forms EC-rich solvation structures at the interface, leading to the formation of an inorganic-organic solid-electrolyte interface (SEI). This effectively suppresses side reactions, allows uniform Zn growth, and improves the cycle life and capacity retention of the battery.
Article
Chemistry, Multidisciplinary
Fangming Liu, Kuo Wang, Qianrui Li, Guoli Zhang, Jiaqi Zhu, Xiao-Xia Liu, Xiaoqi Sun
Summary: Researchers propose a sodium dichloroisocyanurate electrolyte additive with a low concentration of 0.1 M to modify the Zn interface environment and construct a stable organic-inorganic solid-electrolyte interface on the Zn electrode. It suppresses corrosion reactions and directs uniform Zn deposition. The cycle life of the Zn electrode in symmetric cells extends to 1100 h at 2 mA cm(-2) and 2 mA h cm(-2), and the Zn plating/stripping coulombic efficiency reaches 99.5% for more than 450 cycles.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Kuo Wang, Qianrui Li, Guoli Zhang, Shuo Li, Tong Qiu, Xiao-Xia Liu, Xiaoqi Sun
Summary: Researchers have introduced a low concentration of 3-aminobenzenesulfonic acid additive into zinc electrolyte, regulating the interface environment on the zinc electrode and extending the lifespan of symmetric zinc cells to over 1100 hours. The additive forms a stable solid-electrolyte interphase and allows for higher depth of discharge and cycle life.
Article
Chemistry, Multidisciplinary
Wanlong Wu, Xiaoyu Yin, Sibo Wang, Quanwei Jiang, Hua-Yu Shi, Xiaoqi Sun
Summary: In this study, a zinc-dual-halide complex strategy is applied to confine free halides and inhibit polyhalide formation in aqueous zinc-halogen batteries, resulting in excellent cycling stability and efficiency.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xianpeng Yang, Zhongqiu Jia, Wanlong Wu, Hua-Yu Shi, Zirui Lin, Cuicui Li, Xiao-Xia Liu, Xiaoqi Sun
Summary: This study demonstrates an effective strategy to achieve stable cycling of MnO2 cathodes in aqueous zinc batteries by depositing the dissolved Mn2+ back to the cathode, retaining the active material for energy storage.
CHEMICAL COMMUNICATIONS
(2022)
