• Title/Summary/Keyword: Electrochemical energy storage

Search Result 325, Processing Time 0.02 seconds

Recent Progress in Layer-by-layer Assembly of Nanomaterials for Electrochemical Energy Storage Applications

  • Kim, Sung Yeol
    • Journal of the Korean Electrochemical Society
    • /
    • v.17 no.3
    • /
    • pp.139-148
    • /
    • 2014
  • Electrochemical energy-storage devices such as batteries and supercapacitors are important components in emerging portable electronic device, electric vehicle, and clean energy storage and supply technologies. This review describes recent progress in the development of nanostructured electrodes, the main component of the electrochemical energy-storage device, prepared by layer-by-layer (LbL) electrostatic assembly. Major advantages associated with, and challenges to, the fabrication of LbL electrodes, as well as the future outlook for expanding the application of LbL techniques, are discussed.

Revolutionizing Energy Storage: Exploring Processing Approaches and Electrochemical Performance of Metal-Organic Frameworks (MOFs) and Their Hybrids

  • Wajahat Khalid;Muhammad Ramzan Abdul Karim;Mohsin Ali Marwat
    • Journal of Electrochemical Science and Technology
    • /
    • v.15 no.1
    • /
    • pp.14-31
    • /
    • 2024
  • The text highlights the growing need for eco-friendly energy storage and the potential of metal-organic frameworks (MOFs) to address this demand. Despite their promise, challenges in MOF-based energy storage include stability, reproducible synthesis, cost-effectiveness, and scalability. Recent progress in supercapacitor materials, particularly over the last decade, has aimed to overcome these challenges. The review focuses on the morphological characteristics and synthesis methods of MOFs used in supercapacitors to achieve improved electrochemical performance. Various types of MOFs, including monometallic, binary, and tri-metallic compositions, as well as derivatives like hybrid nanostructures, sulfides, phosphides, and carbon composites, are explored for their energy storage potential. The review emphasizes the quest for superior electrochemical performance and stability with MOF-based materials. By analyzing recent research, the review underscores the potential of MOF-based supercapacitors to meet the increasing demands for high power and energy density solutions in the field of energy storage.

Hybrid Energy Storage Mechanism Through Solid Solution Chemistry for Advanced Secondary Batteries (고성능 이차 전지용 하이브리드 에너지 저장 메커니즘을 위한 고용체 화학)

  • Sion Ha;Kyeong-Ho Kim
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.37 no.1
    • /
    • pp.11-25
    • /
    • 2024
  • Lithium-ion batteries (LIBs) have attracted great attention as the common power source in energy storage fields of large-scale applications such as electrical vehicles (EVs), industries, power plants, and grid-scale energy storage systems (ESSs). Insertion, alloying, and conversion reactions are the main electrochemical energy storage mechanisms in LIBs, which determine their electrochemical properties and performances. The electrochemical reaction mechanisms are determined by several factors including crystal structure, components, and composition of electrode materials. This article reviews a new strategy to compensate for the intrinsic shortcomings of each reaction mechanism by introducing the material systems to form a single compound with different types of reaction mechanisms and to allow the simultaneous hybrid electrochemical reaction of two different mechanisms in a single solid solution phase.

Recent Advances on Multi-Dimensional Nanocarbons for Superapacitors: A Review

  • Bae, Joonho
    • Journal of Electrochemical Science and Technology
    • /
    • v.9 no.4
    • /
    • pp.251-259
    • /
    • 2018
  • In general, the charge storage characteristics and overall performance of electrochemical energy devices (such as lithiumion batteries and supercapacitors) significantly depends on the structural and geometrical factors of the electrodes' active materials. The most widely used active materials of electrochemical energy storage devices are based on carbons of various forms. Each carbon type has drawbacks and advantages when used as the electrode material. Studies have been recently carried out to combine different types of carbons, in particular nanostructured carbons, in order to overcome the structure-originated limitations and thus enhance the overall electrochemical performances. In this feature article, we report the recent progress on the development of this novel class of materials (multidimensional nanocarbons), and their applications for supercapacitors. Multidimensional nanocarbons include graphenes/carbon nanotubes (CNTs), CNTs/carbon films, CNTs/fullerenes, and ternary carbon nanostructures. Various applications using these multidimensional nanocarbons have been proposed and demonstrated in the literature. Owing to the recent extensive studies on electrochemical energy storage devices and considering that carbons are their most fundamental electrode materials, the number of reports on nanocarbons employed as electrodes of the electrochemical energy storage devices is rapidly increasing. Recently, numerous multidimensional nanocarbons have been designed, prepared, and utilized as electrodes of electrochemical capacitors or supercapacitors, which are considered next-generation energy devices owing to their unique merits compared to the conventional structures. In this review, we summarize the basic motivations, preparation methods, and resultant supercapacitor performances of each class of multidimensional nanocarbons published in the literature, focusing on recent reports.

Applications and Challenges of Lithium-Sulfur Electrochemical Batteries

  • Mohammed Jasim M. Al Essa
    • Journal of Electrochemical Science and Technology
    • /
    • v.15 no.1
    • /
    • pp.1-13
    • /
    • 2024
  • This paper presents applications of lithium-sulfur (Li-S) energy storage batteries, while showing merits and demerits of several techniques to mitigate their electrochemical challenges. Unmanned aerial vehicles, electric cars, and grid-scale energy storage systems represent main applications of Li-S batteries due to their low cost, high specific capacity, and light weight. However, polysulfide shuttle effects, low conductivities, and low coulombic efficiencies signify key challenges of Li-S batteries, causing high volumetric changes, dendritic growths, and limited cycling performances. Solid-state electrolytes, interfacial interlayers, and electrocatalysts denote promising methods to mitigate such challenges. Moreover, nanomaterials have capability to improve kinetic reactions of Li-S batteries based on several properties of nanoparticles to immobilize sulfur in cathodes, stabilizing lithium in anodes while controlling volumetric growths. Li-S energy storage technologies are able to satisfy requirements of future markets for advanced rechargeable batteries with high-power densities and low costs, considering environmentally friendly systems based on renewable energy sources.

A Hybrid Electrochemical Capacitor Using Aqueous Electrolyte (수용성 전해액을 사용하는 하이브리드 전기화학 축전기)

  • Kim, Jong-Huy;Jin, Chang-Soo;Shin, Kyoung-Hee;Lee, Mi-Jung
    • Journal of the Korean Electrochemical Society
    • /
    • v.6 no.2
    • /
    • pp.153-157
    • /
    • 2003
  • A hybrid electrochemical capacitor having both characteristics of electric double layer capacitance and pseudo-capacitance was studied throughout cell tests. Asymmetric electrodes with $Ni(OH)_2/activated$ carbon based positive electrode and activated carbon based negative electrode were used in preparing test cells of $5\times5cm^2$. Cyclic voltammetry measurements and impedance measurements were conducted to understand electrochemical behavior of each electrode. To find an optimal mass ratio of negative to positive electrode, charge-discharge cycle tests were also performed.

Herbaceous Biomass Waste-Derived Activated Carbons for Supercapacitors

  • Han, Joah;Lee, Jin Hyung;Roh, Kwang Chul
    • Journal of Electrochemical Science and Technology
    • /
    • v.9 no.2
    • /
    • pp.157-162
    • /
    • 2018
  • In the study, herbaceous biomass waste including giant miscanthus, corn stalk, and wheat stalk were used to prepare commercially valuable activated carbons by KOH activation. The waste biomass predominantly consists of cellulose/hemicellulose and lignin, in which decomposition after carbonization and activation contributed to commercially valuable specific surface areas (>$2000m^2/g$) and specific capacitances (>120 F/g) that exceeded those of commercial activated carbon. The significant electrochemical performance of the herbaceous biomass-derived activated carbons indicated the feasibility of utilizing waste biomass to fabricate energy storage materials. Furthermore, with respect to both economic and environmental perspectives, it is advantageous to obtain activated carbon from herbaceous biomass waste given the ease of handling biomass and the low production cost of activated carbon.

Hybridization of the Energy Generator and Storage Device for Self-Powered Electronics (자가구동형 전자소자 구현을 위한 에너지 발전/저장 소자 융합 기술 동향)

  • Lee, Ju-Hyuck
    • Journal of the Korean Electrochemical Society
    • /
    • v.21 no.4
    • /
    • pp.68-79
    • /
    • 2018
  • Currently, hybridization of energy generator and storage devices is considered to be one of the most important energy-related technologies due to the possibility of replacing batteries or extending the lifetime of a batteries in accordance with increasing battery demand. This review aims to describe current progress on the mechanical energy generator and hybridization of energy generator and energy storage devices for self-powered electronics. First, the research trends related to energy generation devices using piezoelectric and triboelectric effect that convert physical energy into electric energy is introduced. In addition, integration of energy generators and energy storage devices is introduced. In particular, self-charging energy cells provide an innovative approach to the direct conversion of mechanical energy into electrochemical energy to decrease energy conversion loss.

Synthesis of TiO2 nanoparticles induced by electron beam irradiation and their electrochemical performance as anode materials for Li-ion batteries

  • Ahn, Ja-Hwa;Eom, Ji-Yong;Kim, Jong-Huy;Kim, Hye Won;Lee, Byung Cheol;Kim, Sung-Soo
    • Journal of Electrochemical Science and Technology
    • /
    • v.6 no.3
    • /
    • pp.75-80
    • /
    • 2015
  • We introduce a new synthesis method to prepare small TiO2 nanoparticles with a narrow particle size distribution, which is achieved by electron beam (E-beam) irradiation. The effects of E-beam irradiation on the synthesis of TiO2 nanoparticles and the electrochemical performance of TiO2 nanoparticles as alternative anode materials for Li-ion batteries are investigated. The TiO2 nanoparticles induced by E-beam irradiation present better cycling performance and rate capability than the TiO2 nanoparticles synthesized by normal hydrolysis reaction. The better electrochemical performance is attributed to small particle size and narrow particle size distribution, resulting in the large surface area that provides innumerable reaction sites and short diffusion length for Li+ through TiO2 nanoparticles.

Electrochemical Impedance Spectroscopy (EIS) Performance Analysis and Challenges in Fuel Cell Applications

  • Padha, Bhavya;Verma, Sonali;Mahajan, Prerna;Arya, Sandeep
    • Journal of Electrochemical Science and Technology
    • /
    • v.13 no.2
    • /
    • pp.167-176
    • /
    • 2022
  • Electrochemical impedance spectroscopy (EIS) is a unique non-destructive technique employed to analyze various devices in different energy storage applications. It characterizes materials and interfaces for their properties in heterogeneous systems employing equivalent circuits as models. So far, it has been used to analyze the performance of various photovoltaic cells, fuel cells, batteries, and other energy storage devices, through equivalent circuit designing. This review highlights the diverse applications of EIS in fuel cells and specific parameters affecting its performance. A particular emphasis has been laid on the challenges faced by this technique and their possible solutions.