Article
Chemistry, Physical
David Perry, Mohamed Mamlouk
Summary: This study examines mass transport within LIBs and the use of electrochemical techniques, particularly EIS, to probe mass transport meaningfully. The benefits of using EIS compared to GITT are demonstrated through FEM simulations, with the application of Distribution of Relaxation Times to assign battery processes to EIS spectra.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Yajun Zhao, Wenhao Tang, Wenhong Liu, Xianghua Kong, Dawei Zhang, Hao Luo, Kewei Teng, Ruiping Liu
Summary: The study demonstrates that constructing Co3O4/Fe2O3 nano-heterostructured catalyst through interfacial engineering can enhance the oxygen reduction and evolution kinetics of Li-O-2 batteries, reduce overpotential, and achieve good cycling stability.
Article
Chemistry, Physical
Hae-Ri Yang, Junesun Hwang, Hyungeun Seo, Kyungbae Kim, Jae-Hun Kim
Summary: Researchers have proposed a composite material to overcome the initial Coulombic efficiency issue in silicon suboxides for lithium-ion batteries and achieved superior cycle performance. The composite material, synthesized through high-energy mechanical milling, showed excellent reversible capacity and cycle performance in electrochemical tests.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Analytical
D. Maurya Gyanprakash, Chandresh Kumar Rastogi
Summary: Silicon is a promising anode material for Li-ion batteries with high specific capacity, but its stability limits its industrial-scale application. Particle size reduction below 150 nm enhances reactivity and cycle life, but falls short of industrial benchmarks. In this study, impedance analysis was used to investigate physicochemical processes at the Si electrode/electrolyte interface. Different Si anode samples were prepared: 50 nm, 150 nm, and a mixture of 50 and 150 nm particles. The small particle size sample exhibited high activity but suffered from high SEI formation, while the 150 nm sample had low SEI formation but high charge transfer resistance. The mixed sample showed a compromise, with the lowest polarization resistance after 50 cycles and intermediate SEI formation, resulting in the highest capacity.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Marcus Muller, Luca Schneider, Nicole Bohn, Joachim R. Binder, Werner Bauer
Summary: The study investigates the behavior of a nanostructured, porous NCM cathode material in terms of electrode processing and electrochemical performance. The results show that nanostructuring does not affect the chemical composition and structural parameters, but only changes the particle morphology. Despite initially high electrode porosities, electrodes with nanostructured NCM can withstand calendering without destroying the porous particles. Full-cell tests reveal improved C-rate capabilities and long-term cycling benefits for the nanostructured material compared to the commercial original NCM.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Kamil Burak Dermenci, Kato Daems, Yagmur Guner, Servet Turan, Joeri Van Mierlo, Maitane Berecibar
Summary: Activated carbons play an important role in high-power Li-ion batteries. This study investigated the electrochemical properties of different commercial activated carbons and found that ordered structures promote Li-ion diffusion, while electronically conductive activated carbons have low charge-transfer resistance and high exchange current density. Long-term capacity retention is correlated with the degree of structural order.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Wenjun Zhang, Xu Li, Yongzhong Jin, Ge Chen, Yuming Li, Shoujun Zeng
Summary: A Co3O4/helical carbon nanofibers (Co3O4/HCNFs) composite was successfully synthesized using a simple and inexpensive method, and it showed excellent cyclability and electrochemical performance as an anode material for lithium-ion batteries. The unique 3D helical structure of the HCNFs played a crucial role in accommodating the volume expansion of nano-Co3O4 during charge-discharge process and improving the conductivity of Co3O4.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Lin Zhang, Chunpeng Zhao, Yujun Liu, Jiajia Xu, Jinhua Sun, Qingsong Wang
Summary: After immersion, the capacity fade of lithium-ion batteries intensifies, leading to a decrease in battery lifespan primarily due to the loss of active material, with higher NaCl concentrations exacerbating the capacity fade. Furthermore, the thermal stability of the cells significantly decreases after immersion, with higher concentrations of NaCl solutions resulting in higher onset temperatures of thermal runaway and lower maximum temperatures.
Article
Energy & Fuels
Josue Obregon, Yu-Ri Han, Chang Won Ho, Devanadane Mouraliraman, Chang Woo Lee, Jae-Yoon Jung
Summary: In this study, a convolutional autoencoder (CAE) and deep neural network (DNN) based architecture called CAE-DNN is proposed for estimating the state-of-health (SOH) of lithium-ion batteries. The architecture extracts latent data representation from electrochemical impedance spectroscopy (EIS) data and utilizes a deep neural network for battery capacity retention and SOH estimation. Experimental results show that the proposed architecture extracts useful features in an unsupervised manner and accurately estimates the SOH of lithium-ion batteries compared to other baseline estimation methods.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Taewhan Kim, Kyoung Ho Kim, Wontae Lee, Woosung Choi, Hyunyoung Park, Hyunwoo Kim, Jaesang Yoon, Yun Seok Choi, Jungho Lee, Ji Man Kim, Won-Sub Yoon
Summary: Mesoporous structures in transition metal oxides show higher reversible capacity and anomalous cycle behavior than bulk materials, attributed to their weaker Co-O and Co-Co bond strength which lead to more reversible conversion reactions, along with the further formation/decomposition of electrolytederived surface layer causing the negative fading phenomenon.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Javier Olarte, Jaione Martinez de Ilarduya, Ekaitz Zulueta, Raquel Ferret, Erol Kurt, Jose Manuel Lopez-Guede
Summary: This study evaluates the evolution of electrochemical parameters to determine the state of charge, state of health, and electrolyte level of vented NiCd batteries. The findings include promising results for SOC estimation based on open-circuit voltage and correlations between electrolyte level and certain parameters of equivalent electric circuits derived by electrochemical impedance spectroscopy. These correlations enable the development of monitoring protocols for NiCd technology, reducing operational and maintenance costs.
Article
Chemistry, Physical
Yuxin Chen, Loraine Torres-Castro, Kuan-Hung Chen, Daniel Penley, Joshua Lamb, Mohan Karulkar, Neil P. Dasgupta
Summary: In this study, incremental capacity analysis was applied to investigate lithium plating during charging process. The results showed the correlation between lithium plating and specific IC peak, and demonstrated the applicability of IC analysis in studying lithium plating in novel cell architectures.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Atefeh Ghazavi, Stuart F. Cogan
Summary: This paper compares the cyclic voltammograms of ultramicroelectrodes (UMEs) and regular electrodes in buffer electrolyte and neutral electrolyte, and evaluates the behavior of UMEs in buffer electrolyte. The study finds that UMEs have higher charge injection capacity and lower specific impedance, and the specific impedance is related to the perimeter-to-area ratio. In addition, the electrochemical properties of UMEs remain stable after long-term pulsing and cycling.
ELECTROCHIMICA ACTA
(2022)
Article
Automation & Control Systems
Changyong Lee, Sugyeong Jo, Daeil Kwon, Michael G. Pecht
Summary: This article introduces an analysis method for capacity-fading behavior of Li-ion batteries, which can detect unhealthy batteries early and significantly reduce the number of reliability tests for unhealthy batteries in practice.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Energy & Fuels
Yonggang Liu, Bo Yang, Yufei Zhang, Rongheng Li, Zheng Chen, Xuan Zhou
Summary: By developing a pseudo-two-dimensional model, this study provides a better understanding of battery charge-discharge characteristics while considering capacity degradation effects. The impact of design parameters on internal resistance is addressed, enabling optimization of battery design and reduction of internal resistance. Additionally, a new two-step constant current charging strategy is proposed to significantly reduce charging time and mitigate capacity fading caused by solid electrolyte interphase films. Furthermore, retired battery profiles are used to analyze changes in battery performance and estimate second-use battery life.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Changhoon Choi, Jung Been Park, Jong Hyun Park, Seungho Yu, Dong-Wan Kim
Summary: This study presents a novel approach to mitigate dendrite growth on Zn anodes in aqueous Zn metal batteries by fabricating an ultrathin and sturdy artificial solid electrolyte interphase (ASEI) composed mainly of interconnected ZnO nanoparticles. The ZnO-rich ASEI facilitates even Zn plating along the Zn(002) plane, minimizing dendrite proliferation and side-reactions. The symmetric cell with ZnO-rich ASEI exhibits outstanding cyclability and reduced voltage hysteresis, indicating a promising approach for stable Zn anodes in large-scale energy storage systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Toxicology
Min-Sung Kang, Gwang-Hee Lee, Ik Hwan Kwon, Mi-Jin Yang, Min Beom Heo, Jae-Won Choi, Tae Geol Lee, Cheol-Ho Yoon, Bosung Baek, Myeong-Chang Sung, Dong-Wan Kim, Eun-Jung Park
Summary: Hexagonal and rod-shaped cerium dioxide nanoparticles (CeONPs) were compared for their toxic effects in mice. It was found that rod-shaped CeONPs induced a more severe pulmonary inflammatory response. The surface charge and protein corona should be carefully considered in interpreting the results.
TOXICOLOGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Hyun Jung Shin, Sung-Woo Park, Sangbaek Park, Dong-Wan Kim
Summary: Vertically aligned reduced graphene oxide (rGO) with sulfur and poly(ethylene oxide)-based polymer electrolyte double-shell layers (VRG@S@PPE) enable high-loading sulfur cathode in lithium-sulfur batteries (LSBs). The combination of rGO with vapor-grown carbon fiber (VGCF) allows for gas evacuation without structural collapse, resulting in perfect double-shell layer contact. With the reinforcement of VGCF, sulfur-infiltrated rGO (VRG@S) exhibits high capacity and the addition of an additional polymer electrolyte further improves cycle retention, enabling safe and stable quasi-solid-state LSBs with high sulfur loading.
Article
Energy & Fuels
Dongjoo Park, Sangbaek Park, Dong-Wan Kim
Summary: We developed a biodegradable separator made from natural cellulose with a fibrous and porous structure rich in polar functional groups. These functional groups enhance electrolyte wettability, polysulfide adsorption, and lithium affinity, thus improving the performance of Li-S batteries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Suk-Ho Hwang, Seung-Deok Seo, Dong-Wan Kim
Summary: A facile and time-saving microwave-assisted wet synthesis approach is proposed for Li6PS5Cl (LPSC) superionic conductors, which shows advantages like fast-PS43- generation, high solubility of LiCl, and low adverse effects from solvent molecules. The LPSC crystal obtained from this approach exhibits high Li-ion conductivity and low electric conductivity. It also shows stability when reacting with Li metal and superior cyclability with NCM622. This synthetic approach provides crucial insights for developing sulfide-based solid-electrolytes and all-solid-state batteries at a commercial-scale perspective.
Article
Chemistry, Physical
Myeong-Chang Sung, Gwang-Hee Lee, Dong-Wan Kim
Summary: The perovskite-type material La0.8Sr0.2CrOx is studied as an OER catalyst, and its oxidation states and conductivities are controlled through crystallization modulation method to enhance its catalytic activity. It is found that the La0.8Sr0.2CrO3 nanowires actively oxidize Li2O2 and increase the OER activity, mainly due to their favorable interaction with Li-deficient solid solution (Li2-xO2) during the charging process. This study provides fundamental insights and understanding for designing high-energy efficient rechargeable Li-O2 battery electrodes.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Sae In Suh, Heesoo Woo, So-Yeon Song, Dongjoo Park, Yong-Yoon Ahn, Eunju Kim, Hongshin Lee, Dong-Wan Kim, Changha Lee, Yong Sik Ok, Jaesang Lee
Summary: In this study, the correlation between the catalytic activity of UK Biochar Research Center biochars (BCs) and their physicochemical properties was explored, and the potential role of endogenous iron in promoting their persulfate activation capability by heat treatment was suggested. It was observed that there was a steady improvement in the persulfate activation efficiency with increasing annealing temperature exclusively for iron-containing BCs (e.g., sewage sludge (SS) BCs). The heat-initiated modification enhanced the electron transfer-mediating capacity and surface affinity toward persulfate, leading to the beneficial effect of annealing on the carbocatalytic activity of iron-containing BCs for non-radical persulfate activation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Seongbin Lee, Sooyeon Kim, Sang Soo Han, Dong-Wan Kim, Jiwon Lee, Youngtak Oh
Summary: In this study, Fe3O4-doped reduced graphene oxide (Fe-rGO) materials were prepared via a liquid-phase reduction technique under different coagulation conditions. The Fe-rGO adsorbents showed an effective and selective adsorption of amphiphilic VOCs, which was attributed to the synergistic effect of Fe3O4 nanoparticles and O active sites. The strategy of fabricating a metal oxide-carbon heterostructure provides a selective adsorption platform for amphiphilic VOCs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Se In Kim, Woong-Ju Kim, Jin Gu Kang, Dong-Wan Kim
Summary: Unlike conventional Si anodes, oxidized Si nanosheets, i.e., siloxene, show minimal volume expansion during cycling due to their unique geometries and chemical structures. However, the interactions of siloxene with binders and their effects on charge storage have not been extensively studied. In this study, the intermolecular interactions of siloxene with four typical binders were investigated, and alginate was found to form the strongest intermolecular bonds with siloxene, leading to enhanced cycling stability and rate performance. The alginate-based siloxene electrode exhibited an unprecedented charge capacity retention of 66% after 500 cycles at 200 mA g-1. This study provides valuable insights for designing binders for electrode materials with similar chemical structures to siloxene.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Sun Hee Choi, Woong-Ju Kim, Byeong-hyeon Lee, Sung-Chul Kim, Jin Gu Kang, Dong-Wan Kim
Summary: This article presents a new solvent-assisted synthesis method that successfully incorporates Sn into Li sulfide conductors. The resulting materials have high crystallinity and excellent ionic conductivity, air stability, and Li metal compatibility, making them suitable for all-solid-state batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Jung Been Park, Changhoon Choi, Sang Won Jung, Byeong Chan Min, Jong Hyun Park, Dong-Wan Kim
Summary: This study develops a stable Zn metal anode in aqueous rechargeable Zn metal batteries (ARZMBs) by designing a Sn-based interfacial layer (ZnTCF@Sn) on Zn with textured crystal facets. ZnTCF@Sn provides abundant zincophilic sites and high surface energy, resulting in fast electrochemical kinetics and dendrite-free deposition. Furthermore, the uniform Sn coverage on the ZnTCF@Sn surface inhibits side reactions and enhances reversibility during Zn deposition/dissolution.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Jong Hyun Park, Changhoon Choi, Jung Been Park, Seungho Yu, Dong-Wan Kim
Summary: Aqueous zinc-ion batteries (AZIBs) have gained attention for grid-scale energy storage. However, challenges such as dendrite accumulation, gas generation, and corrosion hinder their commercialization. This study proposes a novel artificial protective layer to address these issues, improving the stability and durability of the zinc anode.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kyounghoon Jung, Dwi Sakti Aldianto Pratama, Andi Haryanto, Jin Il Jang, Hyung Min Kim, Jae-Chan Kim, Chan Woo Lee, Dong-Wan Kim
Summary: The incorporation of iridium in ruthenium phosphides reduces the binding energy of hydrogen intermediates, enhancing catalytic activity and making it a promising low-cost catalyst for hydrogen evolution.
ADVANCED FIBER MATERIALS
(2023)
Article
Chemistry, Physical
Kunik Jang, Hyunseok Yoon, Ji Seong Hyoung, Dwi Sakti Aldianto Pratama, Chan Woo Lee, Dong-Wan Kim
Summary: In this study, a highly efficient electrocatalyst for hydrogen evolution reaction (HER) in alkaline media at high current densities was designed by Ru heteroatom doping and an open nanoframe structure. The designed catalyst exhibited excellent performance with low overpotential and long-term stability, attributed to the hydrophilic and aerophobic properties of the catalyst surface.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Review
Electrochemistry
Hyunseok Yoon, Bobae Ju, Dong-Wan Kim
Summary: Polymer electrolyte membrane water electrolysis (PEMWE) is a promising hydrogen energy production technology, but it still faces challenges in the acidic oxygen evolution reaction (OER). Existing noble metal electrocatalytic materials are insufficient for commercialization, necessitating the development of low-cost, highly active, and stable catalysts.