Article
Chemistry, Physical
Ning An, Zhen Guo, Jiao Xin, Yuanyuan He, Kefeng Xie, Daming Sun, Xiuyan Dong, Zhongai Hu
Summary: This study demonstrates the fabrication of a redox-active covalent organic frameworks (COFs)/graphene composite aerogel electrode, which efficiently addresses the low electrical conductivity and sluggish electron transfer issues within the organic framework, showing high specific capacitance and fast kinetics. Moreover, the binder-free redox-active COFs/graphene composite aerogel and pure graphene aerogel are assembled into an asymmetric supercapacitor, achieving excellent performance in energy density and power density.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Materials Science, Multidisciplinary
Xiandong Yue, Haixia Yang, Yang Cao, Lihang Jiang, Haokun Li, Fei Shi, Jingxiao Liu
Summary: This study successfully prepared nitrogen-doped cornstalk activated carbon with a high specific surface area, showing excellent electrochemical performance and particularly high cycling stability.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Xiaodong Xu, Krzysztof Sielicki, Jiakang Min, Jiaxin Li, Chuncheng Hao, Xin Wen, Xuecheng Chen, Ewa Mijowska
Summary: A method was developed to convert waste wolfberry fruits into porous carbon materials and applied them in supercapacitors. The fabricated carbon materials exhibited large specific surface area and hierarchical porosity, showing excellent capacitance performance and cycling stability. This study provided a facile and low-cost approach to recycle renewable biowastes into high-valued carbon materials and further expanded their application in high-performance energy storage devices.
Article
Chemistry, Physical
Xiang Wei, Baoping Qiu, Huadong Tian, Yaohui Lv, Wei Zhang, Qingqing Qin, Zailiang Liu, Feng Wei
Summary: A hierarchical porous carbon material was prepared using a self-made Fe-based template strategy and anthracene as the carbon precursor. This material exhibited high specific capacitance and excellent cycling stability, showing great potential for high-performance electrochemical energy storage devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Tingting Zhang, Peng Liu, Yan Zhong, Jie Zheng, Kuan Deng, Xingbin Lv, Hongjiao Li, Wen Tian, Junyi Ji
Summary: Rational design of carbonaceous-based electrodes with specific pore structure and surface modification is crucial for high performance energy storage. In this study, a N, S co-doped porous carbon nanotubes with hierarchically hollowed and trunk-branched structure was fabricated. The resulting branched carbon nanotubes showed excellent capacitance and cyclic stability in supercapacitors as well as high specific capacity and rate capability in lithium-ion batteries.
Article
Thermodynamics
Hongwei Liu, Yongzhen Wang, Liang Lv, Xiao Liu, Ziqi Wang, Jun Liu
Summary: Functional coal-based carbon materials with suitable pore structure and surface properties were prepared from lignite through a ball milling-assisted bimetallic salt catalytic pyrolysis strategy. The optimized carbon material, OHPC-1, exhibited a large specific surface area, rational pore structure distribution, and suitable oxygen doping, leading to excellent charge storage and fast electrolyte ions diffusion. The assembled OHPC-1//OHPC-1 symmetrical capacitor showed high energy density and cycling stability at different power densities, demonstrating the promising application of lignite in the preparation of cost-effective porous carbons for high-performance supercapacitors.
Article
Energy & Fuels
Huachen Liu, Feng Zhang, Zhaofeng Wu, Entian Cui, Lu Yue, Guihua Hou, Luming Wang
Summary: In this study, nitrogen-doped porous carbon derived from cellulose microfibers of rice straw was prepared, showing high specific surface area and specific capacitance, as well as good rate capability and cycling stability. This provides a robust method for the preparation of porous carbons from lignocellulosic biomasses.
Article
Chemistry, Applied
Geyu Feng, Ziyun Su, Huiyu Duan, Suli Liu, Huan Pang, Changyun Chen
Summary: In this study, edible fungus residue is used as a precursor to obtain edible fungi derived hierarchical porous carbons (EFHPCs) with hierarchical porous structure and heteroatom doping through a carbonization-activation method. When assembled in an asymmetric aqueous supercapacitor, EFHPCs exhibit significantly higher energy density and can be used as ideal negative electrodes for supercapacitors.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Energy & Fuels
Shalakha Saha, Darshna Potphode, Chandra S. Sharma
Summary: This study presents a simple two-step strategy of carbonization and KOH activation to transform Borassus flabellifer fruit flesh into activated carbon with high surface area and hierarchical porous morphology, showing excellent electrochemical performance. The activated carbon exhibited specific capacitance of 226 F g(-1) in 1 M H2SO4 and 159 F g(-1) in neat ionic liquid EMIMBF4 electrolyte, achieving a maximum energy density of 8 Wh kg(-1) in aqueous medium and 50 Wh kg(-1) in non-aqueous medium.
Article
Chemistry, Multidisciplinary
Quanzhou Du, Yuhua Zhao, Kelei Zhuo, Yujuan Chen, Lifang Yang, Chunfeng Wang, Jianji Wang
Summary: This study presents a pre-assembly strategy to prepare three-dimensional hierarchical porous carbons as electrode materials for supercapacitors, aiming to investigate the effects of pore volume, pore size, and ratio of mesopores to micropores on the performance of ionic liquid-based supercapacitors. The prepared HPCs exhibit excellent specific capacity and energy density, making them promising materials for high-performance supercapacitors.
Article
Energy & Fuels
Rui Wang, Xinyi Li, Zhiguo Nie, Yang Zhao, Huan Wang
Summary: Supercapacitors have gained significant attention for their high power density and long cyclic stability in the past decade, with recent focus on metal and metal oxide nanoparticles-composited porous carbon as electrode materials. Research efforts have been directed towards improving key performance parameters such as specific capacitance and cyclic stability by utilizing various metals and their oxides composited with porous carbon. Discussions on the prospects and challenges in enhancing energy storage performance for supercapacitors through design, preparation, and structure optimization of metal and metal oxide-based porous carbon electrode materials are also presented.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Chang Ma, Liqiang Wu, Mahmut Dirican, Hui Cheng, Junjing Li, Yan Song, Jingli Shi, Xiangwu Zhang
Summary: Construction of sub-micron carbon fibers using porous carbon black as the building unit and PAN-based pyrolytic carbon as the binder results in fibers with high porosity, specific surface area, and N/O-containing surface. The CB content significantly affects the thermal stability, flexibility, and conductivity of the fibers, which exhibit a considerable specific capacitance and excellent cycling stability for use in flexible supercapacitor electrodes.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Xu Liu, Cheng-Fang Liu, Shihao Xu, Tao Cheng, Shi Wang, Wen-Yong Lai, Wei Huang
Summary: In order to address global warming and fossil fuel shortages, it is necessary to develop environmentally friendly and sustainable renewable energy technologies. Supercapacitors bridge the performance gap between electrostatic double-layer capacitors and batteries by storing energy from electrochemical processes at the electrode surface. Organic electrode materials, particularly porous organic polymers (POPs), have drawn extensive attention due to their special characteristics and potential for use in supercapacitors.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
Jiaqi Shen, Xiaozhen Chen, Peng Wang, Feng Zhou, Lei Lu, Rongfang Wang, Vladimir Linkov, Shan Ji
Summary: A new material for supercapacitors, HPZC, loaded with a unique porous structure and a 2D material, demonstrates high power and energy densities with improved charge/mass transport efficiency. This study paves the way for designing transition metal carbodiimide materials as potential electrodes in asymmetric supercapacitors.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Guiqiang Wang, Jiayu Bi, Miao Lei, Jieqiong Liu, Wei Zhang
Summary: Carbon materials derived from carex meyeriana show high surface area and unique hierarchical porous structure, making them promising electrode materials for supercapacitors. These materials exhibit excellent capacitive performance, energy density, and power density in a KOH electrolyte, providing a green and facile method for high-performance supercapacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Review
Biochemical Research Methods
Pradheep Thiyagarajan
Summary: Carbon-based nanostructures such as graphene and 3D graphene are promising materials for electronic, electrochemical energy storage, optical, and sensing applications. While graphene has zero bandgap which limits its mainstream applications, 3D graphene offers good electronic conductivity, mobility, bandgap, and electrochemical properties for various applications.
IET NANOBIOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jong-Chul Yoon, Xinyue Dai, Kyeong-Nam Kang, Jongha Hwang, Myung-Jun Kwak, Feng Ding, Ji-Hyun Jang
Summary: The in situ deoxidation and graphitization mechanism using a Fischer-Tropsch reaction catalyst allowed for high-quality reduced graphene oxide sheets under low temperature conditions. The process suppressed carbon loss in graphene oxide sheets, resulting in near-perfect graphene with lower electrical resistance and acting as an efficient catalyst for hydrogen and oxygen evolution reactions.
Correction
Chemistry, Multidisciplinary
Jong-Chul Yoon, Xinyue Dai, Kyeong-Nam Kang, Jongha Hwang, Myung-Jun Kwak, Sun Hwa Lee, Feng Ding, Ji-Hyun Jang
Article
Chemistry, Multidisciplinary
Sourav Chaule, Jongha Hwang, Seong-Ji Ha, Jihun Kang, Jong-Chul Yoon, Ji-Hyun Jang
Summary: This study addresses the issues of heat loss and salt accumulation in sea water desalination using the broad-band solar spectrum, with two cost-effective approaches. The design of a concave shaped supporter by 3D-printing and the use of a double layered photoabsorber significantly improve the efficiency and stability of the solar evaporator.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Gyujin Song, June Ho Lee, Sangyeop Lee, Dong-Yeob Han, Sungho Choi, Myung-Jun Kwak, Ji-Hyun Jang, Donghwa Lee, Soojin Park
Summary: This study designed a hybrid conductive shell of multi-component titanium oxide on a germanium micro-structure, enabling convenient hybrid ionic/electronic conductivity. The well-constructed electrode features high initial Coulombic efficiency and stable cycle life, while the stress-resilient properties of dense microparticle help alleviate structural failure.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Juhyung Park, Ki-Yong Yoon, Myung-Jun Kwak, Jae-Eun Lee, Jihun Kang, Ji-Hyun Jang
Summary: The study manipulated the Sn concentration in hematite through a two-step annealing process, resulting in reduced structural disorder and improved charge transport ability, leading to higher photocurrent density. By decorating with efficient co-catalyst, a further increase in photocurrent density was achieved. The optimized hematite photocatalyst demonstrated improved charging potential and cyclability in solar-assisted chargeable batteries compared to expensive Ir/C.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Ki-Yong Yoon, Juhyung Park, Hosik Lee, Ji Hui Seo, Myung-Jun Kwak, Jun Hee Lee, Ji-Hyun Jang
Summary: Doping engineering plays a crucial role in controlling the electrical, optical, and structural properties of semiconductors. Understanding interactions between impurities can lead to the efficient fabrication of photoelectrodes.
Article
Nanoscience & Nanotechnology
Kyeong-Nam Kang, Sun- Kim, Jong-Chul Yoon, Jinho Kim, Collin Cahoon, Ji-Hyun Jang
Summary: This study presents a facile electrochemical method to synthesize a cheap nickel copper double hydroxide (NiCu-DH) electrocatalyst for glucose oxidation reaction (GOR) and hydrogen evolution reaction (HER). The electrode exhibits a 3D-interconnected porous structure with excellent electrocatalytic activity, making it suitable for both sensing and catalysis.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Seong-Ji Ha, Jongha Hwang, Myung-Jun Kwak, Jong-Chul Yoon, Ji-Hyun Jang
Summary: This study presents a cost-effective carbon-based novel material with high catalytic activity and good durability in Zn-air batteries. The material is prepared through a simple graphitization process and utilizes in situ growth of graphene in a 3D-metal-coordinated hydrogel. The results show greatly reduced carbon corrosion reaction (CCR) and efficient bifunctional electrocatalytic performance in an alkaline media.
Article
Chemistry, Physical
Jihun Kang, Ki-Yong Yoon, Jae-Eun Lee, Juhyung Park, Sourav Chaule, Ji-Hyun Jang
Summary: For the first time, a simple in-situ phosphorus (P) doping strategy was used to improve the photoelectrochemical water splitting (PEC) performance of hematite. The introduction of FePO4 regions on the Ti-doped FeOOH surface and subsequent high-temperature annealing resulted in the fabrication of mesoporous P,Ti co-doped Fe2O3 nanorods. The resulting P,Ti-Fe2O3 photoanode exhibited significantly improved photo-current density, and with the deposition of the NiFeOx cocatalyst, it achieved excellent photocurrent density with a remarkable cathodic shift of the onset potential.
Article
Chemistry, Physical
Hyo-Jin Ahn, Ki-Yong Yoon, Mingi Sung, Hyeonjin Yoo, Hyungju Ahn, Byoung Hoon Lee, Junghoon Lee, Ji-Hyun Jang
Summary: This study explored the potential of using diketopyrrolopyrrole (DPP)based pi-conjugated polymers as hole transport layer material in heteroatom-doped hematite (Ti-Fe2O3/Ge-Fe2O3) photoanodes for efficient photoelectrochemical water splitting. The siloxane-modified pi-conjugated polymer (P-Si) exhibited high carrier mobility and stability, leading to a 1.8-fold increase in photocurrent density and improved stability compared to Ge-doped porous Fe2O3 (Ge-PH). This study demonstrated the successful use of inherently unstable pi-conjugated polymers as a hole extracting/transport medium for efficient and stable water splitting.
ACS ENERGY LETTERS
(2023)
Article
Energy & Fuels
Balaji G. Ghule, Ji-Hyun Jang
Summary: First-principles-based density functional theory (DFT) calculations were used to investigate the electrochemical CO2 reduction (ECR) activity of cation-doped Bi2O3. The ECR reaction over pure and doped Bi2O3 (100) surfaces was studied, and Gibbs free energy diagrams of HCOOH formation via COOH and HCOO pathways were demonstrated. Doping can alter the rate-determining step and reduce the Gibbs free energy, resulting in enhanced CO2 reduction activity on the TiZr-Bi2O3 surface.
Article
Chemistry, Physical
Yang Song, Hyunmin Kim, Ji-Hyun Jang, Wenjun Bai, Caichao Ye, Jiamin Gu, Yunfei Bu
Summary: This study presents a novel electro-catalyst composed of Pt3Ni alloy nanoparticles exsolved on oxygen-deficient perovskite oxides. The research explores the atomic-scale mechanisms and demonstrates the formation of a core-shell structure during water electrolysis, enhancing the electrochemical performance and operational durability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Juhyung Park, Ki-Yong Yoon, Myung-Jun Kwak, Jihun Kang, Suhee Kim, Sourav Chaule, Seong-Ji Ha, Ji-Hyun Jang
Summary: The use of zero-dimensional nanofragmented MXene as a hole transport material combined with an oxygen evolution catalyst successfully overcomes the sluggish oxygen evolution reaction of hematite for efficient water splitting.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Juhyung Park, Jihun Kang, Sourav Chaule, Ji-Hyun Jang
Summary: Extensive research has been conducted on photoelectrochemical water splitting as a promising solution to meet the increasing demand for cleaner and renewable energy in a sustainable manner. This review article primarily focuses on strategies aimed at improving the water oxidation performance through heteroatom doping.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)