Article
Energy & Fuels
Luxmi Rani, Jeong In Han
Summary: This study investigates high performance energy storage electrode materials using a simple and feasible hydrothermal technique. SnS2 microspheres were synthesized and characterized, and their supercapacitive performance was evaluated. The addition of a moderate amount of MWCNTs enhanced the specific capacity of SnS2 microspheres. Aqueous asymmetric supercapacitors (ASC) were designed with MWCNT/SnS2 as the positive electrode and activated carbon as the negative electrode, delivering high energy density and power density. Additionally, multiple parallel-connected LEDs were successfully lit using series-connected MWCNT/SnS2//AC devices.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Lulu Lyu, Jeongmin Kang, Kwang-dong Seong, Chae Won Kim, Jiho Lim, Yuanzhe Piao
Summary: By constructing a three-dimensional conductive graphene-carbon nanotube hydrogel network on nickel foam, this study has successfully improved the redox reaction kinetics and ionic electronic conductivity of ternary transition metal compounds, leading to high capacity, favorable rate performance, and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Luxmi Rani, Jeong In Han
Summary: In this study, microspheres of CoS were synthesized by the commonly used hydrothermal method and characterized by various techniques. The prepared CoS material showed a high specific capacity of 112.62 mAh g-1 as electrode material for supercapacitors at 1 A g-1. By adding a small amount of multi-walled carbon nanotubes (MWCNTs), the specific capacity was further improved to 158 mAh g-1 at the same current density. Aqueous asymmetric supercapacitors (ASC) were designed using MWCNT/CoS as the positive electrode and activated carbon (AC) as the negative electrode, resulting in a high energy density of 31.6 W h kg-1 at a power density of 750 W h kg-1.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Ji Hoon Kim, Yong-il Ko, Seo Yun Lee, Yun Seon Lee, Su Kyung Kim, Yoong Ahm Kim, Cheol-Min Yang
Summary: This paper reports a novel composite of graphene oxide (GO) and single-walled carbon nanohorns (SWCNHs) as an effective substrate for Ni-Co layered double hydroxides (LDH) coatings. The composite exhibited excellent electrochemical characteristics and facile synthesis, making it a promising candidate for pseudocapacitor applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Fitri Nur Indah Sari, Kuang-Cheng Lin, Jyh-Ming Ting
Summary: In this study, ternary metal hydroxide nanorods were grown on Ni foam using a facile hydrothermal method for novel electrode applications in pseudocapacitors. The resulting core-shelled structure exhibited excellent electrochemical performance, including high specific capacitance, retention, and cycling stability. Furthermore, when evaluated as a positive electrode in an asymmetric supercapacitor, the core-shelled structure demonstrated outstanding energy density and cycling stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Jai Bhagwan, Jeong In Han
Summary: In this study, a hybrid electrode material of CoMn2O4 hexagonal nanoplates and multi-walled carbon nanotubes (MWCNTs) was successfully synthesized and showed high specific capacity and energy density in supercapacitors. TEM analysis revealed that CoMn2O4 nanoplates were uniformly anchored on MWCNTs, which maintained good electronic channels throughout the electrode material. The synergistic interaction between MWCNTs and CoMn2O4 nanoplates contributed to the improved specific capacity and energy density of the hybrid electrode.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Mohamed A. Nassar, S. El-dek, Waleed M. A. El Rouby, Ahmed G. El-Deen
Summary: The Co3O4/NiO/rGO ternary nanocomposite was successfully fabricated using a hydrothermal method, showing good capacitance value, cycling stability, and low equivalent series resistance. The assembled ASC with Co3O4/NiO/rGO electrode as positive electrode and Fe2O3/rGO binary composite as negative electrode achieved high energy density, high-power density, and long life-time, opening new doors for promising green, economic, and efficient material-based supercapacitors.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Yu Jun Yang, Songyang Chen, Chenjia Jiang, Ningya Wang, Panxiang Yang, Mengxiao Liu, Yao Cheng
Summary: In this study, flower-like Mn3O4/NiCo-layered double hydroxide@multiwalled carbon nanotube nanocomposites were directly assembled on Ni foam using a novel two-step method. The resulting nanocomposites exhibited excellent charge storage capability in electrochemical tests, indicating their great potential for application.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Jin Chang, Xindong Du, Jing Feng
Summary: In this study, Co doped Ni(OH)2 and NiOOH array structure were synthesized using a hydrothermal method. The use of vertical hanging Ni foam provided sufficient reaction sites to ensure the full growth of the array structure, resulting in a large mass loading of active materials. The presence of embedded CH3COO- and strong electron exchange between Ni(OH)2 or NiOOH and Ni facilitated efficient ion and electron transport, leading to improved capacitive and rate performance of the material.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Chao Chen, Xiaohua Deng, Yingjie Deng, Lu An, Yijie Deng, Yuying Zheng, Dai Dang, Xu Yang
Summary: In this study, a self-supporting Co-Ni LDH electrode with excellent electrochemical activity and stability in oxygen evolution reactions (OER) and supercapacitors was developed. The electrode exhibited low overpotential, superior stability, high specific capacitance, and excellent cycle life.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Lin Ouyang, Chung-Hsuan Hsiao, Ying-Chieh Chen, Chi-Young Lee, Nyan-Hwa Tai
Summary: Needle-like Co3O4 is synthesized using the hydrothermal method and then Ni-Mn LDH is grown on its surface through the water bath method to form a hierarchical Ni-Mn LDH/Co3O4/CP composite electrode. It is concluded that the uniform deposition of Ni-Mn LDH on the surface of Co3O4 plays a key role in enhancing the specific capacitance.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Yi-Wen Long, Hong-Yan Zeng, Hao-Bo Li, Sheng Xu, Shi-Bing Lv, Zhen Li, Zi-Feng Tian
Summary: The pineapple flower-like hierarchical Co3O4@CoAl-layered double hydroxides were designed and synthesized for supercapacitors, showing superior electrochemical performance, particularly in terms of energy density, rate capability, and long-term cycle stability.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Physical
Yushuai Yao, Yi Yu, Liu Wan, Cheng Du, Yan Zhang, Jian Chen, Mingjiang Xie
Summary: In this study, a scalable and easy-operated strategy was developed for the in situ growth of MgCo-Ni LDH on reduced graphene using ball-milling combined with ion-exchange technique. The resulting Mg-Co-Ni LDH/rG-x composite exhibited nanosheet morphology, high surface area, and homogenous elements distribution. As an electrode for supercapacitor, it achieved a maximum capacitance of 1204 F/g@1.0 A/g and showed excellent cycling stability with 90.5% capacitance retention after 20,000 cycles at a current density of 5.0 A/g. This method offers great potential for the synthesis of various hydroxides/oxides on carbon substrates and can be applied in catalysis, adsorption, and energy storage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Weiwen Chen, Chunfeng Hao, Zenghui Qiu, Xin Zhang, Haijun Xu, Bingzhe Yu, Shaowei Chen
Summary: In this study, a 3D layered Ti3C2TX@NiO-RGO heterostructured hydrogel with ultrahigh specific capacitance was successfully synthesized. It was found that a defective RGO hydrogel exhibited a higher specific capacitance. The combination of these two materials as electrode in an ASC showed a large operating voltage, high energy density, and remarkable cycling stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Ahmed G. El-Deen, Mohamed K. Abdel-Sattar, Nageh K. Allam
Summary: Researchers have successfully developed a new type of supercapacitor electrode material with a three-dimensional layered structure to improve energy density and cycle stability. By constructing this material, an asymmetric supercapacitor device with excellent rate capability and cycle stability has been manufactured.
APPLIED SURFACE SCIENCE
(2022)
Article
Electrochemistry
Lulu Lyu, Hua Chai, Kwang-dong Seong, Chaedong Lee, Jeongmin Kang, Wang Zhang, Yuanzhe Piao
ELECTROCHIMICA ACTA
(2018)
Article
Nanoscience & Nanotechnology
Lulu Lyu, Kwang-dong Seong, Jong Min Kim, Wang Zhang, Xuanzhen Jin, Dae Kyom Kim, Youngmoo Jeon, Jeongmin Kang, Yuanzhe Piao
NANO-MICRO LETTERS
(2019)
Article
Engineering, Environmental
Liwei Lin, Yejung Choi, Tianyu Chen, Hoonsub Kim, Kyu Sang Lee, Jeongmin Kang, Lulu Lyu, Jiefeng Gao, Yuanzhe Piao
Summary: A flexible, multi-functional, wearable and conductive nanofiber composite strain sensor has been proposed with enhanced conductivity and sensing performance, capable of monitoring various human body movements and sensor signals in multiple vertical directions for more accurate results.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Lulu Lyu, Jeongmin Kang, Kwang-dong Seong, Chae Won Kim, Jiho Lim, Yuanzhe Piao
Summary: By constructing a three-dimensional conductive graphene-carbon nanotube hydrogel network on nickel foam, this study has successfully improved the redox reaction kinetics and ionic electronic conductivity of ternary transition metal compounds, leading to high capacity, favorable rate performance, and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Lulu Lyu, Wytse Hooch Antink, Young Seong Kim, Chae Won Kim, Taeghwan Hyeon, Yuanzhe Piao
Summary: This article discusses the recent developments of transition metal compounds as electrode materials for flexible and stretchable supercapacitors, emphasizing on energy storage mechanisms, substrate and electrolyte selection. An analysis of the electrochemical performance and features of TMC-based electrodes for FS-SCs is also provided.
Article
Materials Science, Multidisciplinary
Yejung Choi, Tianyu Chen, Dongwon Kim, Sang Gu Ji, Hwichan Hong, Lulu Lyu, Myeongseok Jang, Yuanzhe Piao
Summary: By employing strategies such as MOF-templated morphology control, secondary metal incorporation, and nitrogen doping, a highly efficient 3D rod-shaped porous iron-molybdenum oxynitride electrode was successfully synthesized. This material exhibits outstanding electrocatalytic performances in hydrogen evolution reaction, oxygen evolution reaction, and overall water splitting, surpassing commercial noble metal pairs in high current densities and showing potential for long-term stability.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Physical
Lulu Lyu, Wytse Hooch Antink, Byoung-Hoon Lee, Chae Won Kim, Euiyeon Jung, Kwang-dong Seong, Taeghwan Hyeon, Yuanzhe Piao
Summary: Metal phosphides, particularly NiCoP doped with various metal cations, show enhanced electrochemical performance for energy storage and electrocatalysis. The incorporation of multiple dopants results in increased active sites, improved ion-diffusion kinetics, and a modulated electronic structure, leading to superior capacity and cycling stability. An aqueous hybrid supercapacitor utilizing AlCu-NiCoP as the positive electrode demonstrated high energy density and good cycling stability.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Kwang-dong Seong, Jae-Yeong Jung, Jeongmin Kang, Da-Seul Kim, Lulu Lyu, Soonmin Seo, Ju-Hyung Kim, Yuanzhe Piao
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Review
Chemistry, Multidisciplinary
Lulu Lyu, Kwang-dong Seong, Dongjin Ko, Juhyung Choi, Chaedong Lee, Taejin Hwang, Youngseul Cho, Xuanzhen Jin, Wang Zhang, Huan Pang, Yuanzhe Piao
MATERIALS CHEMISTRY FRONTIERS
(2019)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)