Article
Chemistry, Physical
Yaodong Ma, Pengqian Guo, Mengting Liu, Pu Cheng, Tianyao Zhang, Jiande Liu, Dequan Liu, Deyan He
Summary: Porous carbon coated silicon nanoparticles were prepared as anode materials for lithium-ion batteries to suppress the volume expansion effect of silicon and improve the infiltration of electrolyte and the diffusion of lithium ions. The mass ratio of the anode materials effectively controlled the specific capacities and reduced production cost.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xu Liu, Huitian Liu, Yuhao Cao, Xiaochen Wu, Zhongqiang Shan
Summary: Chemical-expanded graphite (CEG) is used as a carbon matrix to form Si@CEG/C composites with an embedded structure, effectively addressing the challenges posed by volume change and electrochemical interface of Si anode. The embedded structure enables better cycling performance and rate capability for Si@CEG/C.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Selin Ozen, Omer Eroglu, Nilgun Karatepe
Summary: Silica-based materials are a promising alternative for anode materials due to their high specific capacity, abundance, safety, and environmental friendliness. However, the volume expansion and the formation of SEI result in active lithium loss and poor Coulombic efficiency. Pre-lithiation, using carbon-coated silica electrodes, effectively replenishes the lithium loss and improves the overall capacity and Coulombic efficiency of the cells. The preformed SEI and the lithium reservoir within the anode contribute to excellent cycling stability and rate capability.
Article
Materials Science, Ceramics
Kaidan Wu, Yefeng Feng, Jin Ke, Bingwen Yang, Zhiling Guo, Deping Xiong, Miao He
Summary: Graphite nanosheets coated by LiF/SnO2 composites are designed to achieve a lithium ion anode material with excellent performance. LiF nanoparticles play a significant role in improving the electrochemical performance by inhibiting electrolyte decomposition and providing excess Li sources during cycling, resulting in an outstanding capacity and long cycling performance. First-principles calculations demonstrate that F-doped SnO2 has a lower free energy compared to SnO2, leading to a robust composite architecture and high cycling stability.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Shuo Liu, Shuang Tian, Zhilong He, Hao Li, Yonggao Xia
Summary: Pre-lithiation technology significantly impacts the electrochemical performance of high SiOx content cells, improving the initial coulombic efficiency (ICE) and cycling stability. The study investigated the effects of different pre-lithiation amounts on capacity and cycling stability of LiNi0.8Co0.1Mn0.1O2 || SiOx/Graphite pouch cells. Increasing pre-lithiation amounts greatly improved cell capacity, but also accelerated aging. The study highlights the complex relationship between pre-lithiation amounts and electrochemical performance, particularly in SiOx-based cells.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Physical
Peng Li, Hun Kim, Seung-Taek Myung, Yang-Kook Sun
Summary: This review highlights the necessity of co-exploitation of silicon and graphite, and systematically concludes the key issues, challenges, and perspectives of Si-graphite electrodes. Through a deep understanding of associated electrochemical processes, the component and structural optimization of Si-graphite anodes could be effectively enhanced.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Zhiwen Wang, Dong Cao, Mingxi Ren, Hanning Zhang, Limei Pan, Chuanfang John Zhang, Jian Yang
Summary: A Si@Ti3C2Tx composite with a fluffy and porous structure was prepared using a simple suspension mixing-freeze drying process, which can effectively improve the stability and cycling efficiency of silicon nanoparticles in lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Gerrit Michael Overhoff, Roman Noelle, Vassilios Siozios, Martin Winter, Tobias Placke
Summary: The study evaluates the beneficial impact of pre-lithiated Si/C electrodes in NCM111 and their effects on battery performance. It shows that pre-lithiation techniques can significantly improve both capacity and cycling efficiency of the batteries.
BATTERIES & SUPERCAPS
(2021)
Article
Nanoscience & Nanotechnology
Jichang Sun, Aohan Li, Penglun Zheng, Yun Zheng
Summary: The Si/FeSi2@C composite material combines the high capacity and safety features of the Si negative electrode with the stabilizing properties of FeSi2. With the addition of a homogeneous carbon layer, the composite enhances electrical conductivity and provides structural support. It also contributes to stabilizing the solid-electrolyte interphase (SEI) film, leading to improved battery performance.
Article
Chemistry, Multidisciplinary
Rohan Patil, Manisha Phadatare, Nicklas Blomquist, Jonas Ortegren, Magnus Hummelgard, Jagruti Meshram, Deepak Dubal, Hakan Olin
Summary: Silicon anodes are promising for next-generation high capacity lithium-ion batteries, but the volume changes during charge-discharge cycles lead to capacity fading. While nanometer-scaled silicon particles can help reduce this issue, challenges related to SEI layer formation still need to be addressed. By developing a composite anode material with silicon nanoparticles and nanographite, stable SEI layers were formed, leading to high specific capacity and improved cyclability even at high current rates.
Article
Electrochemistry
Qiuyan Shen, Ruibing Zheng, Yingying Lv, Yanyan Lou, Liyi Shi, Shuai Yuan
Summary: This study utilizes the bead grinding method to break micro-sized silicon and graphite particles simultaneously, promoting solid-solid interface reaction between fresh silicon nanoparticles and graphite nanosheets, and achieves the synthesis of Si-graphite microsphere through evaporation induced self-assembly. The Si-G microsphere exhibits excellent cycling performance as a potential candidate for high-performance silicon-graphite anodes.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Zhen Luo, Ying Xu, Cui-Ran Gong, Yang-Qing Zheng, Zhao-Xi Zhou, Li-Ming Yu
Summary: The Ur Binder is beneficial for preparing uniform electrode slurry and forming a uniform electrode coating layer, which helps to maintain a close contact between electrochemical active materials and conductive carbon. Strong interaction between the polymer of the Ur Binder and silicon powders plays a key role in the long-term cycling performance of lithium batteries. Lithium coin cells using the Ur Binder show high capacity and excellent capacity retention, even at a high current density, which can potentially alleviate the low capacity limitations of ultraviolet curable electrodes for commercial applications.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Environmental
Chen Wang, Xiaochen Sun, Jv Zhang, Xiaoli Zhai, Xin Zhang, Zhuo Li, Hongdong Li
Summary: In this study, it is demonstrated that introducing nanodiamonds with high concentration of H2O can improve the performance of commercial lithium ion batteries. The synergistic effect of nanodiamonds and H2O leads to the formation of a highly conductive SEI network, enhanced ionic conductivity and separator wettability of electrolyte, mitigated erosion of graphite anode, and increased storage sites for Li+. This work provides an efficient method to boost the performance of LIBs and reduce production costs in practical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Mika Fukunishi, Shunya Ishii, Yusuke Himata, Atsushi Kondo, Fumisato Ozawa, Morihiro Saito
Summary: In this study, four ethers were compared as solvents for lithium naphthalenide (Li-NTL) solutions for pre-doping lithium into silicon electrodes. The results showed that the solvents have an impact on the stability and equilibrium potential of Li-NTL solutions, which in turn affects the doping capacity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Wenlu Min, Xianghong Chen, Shuhan Huang, Yunlong Liao, Zhiyong Liang, Yu Lei, Jiantie Xu
Summary: The synthesis of reduced holey graphene oxides with different structures is important for the development of advanced lithium ion batteries. The rhG-400 as cathode for LIBs delivers high reversible capacity, excellent rate capability, and maintains an ultra-long cycling life.
Article
Chemistry, Multidisciplinary
Yong Seon Shin, Kiyoung Lee, Young Rae Kim, Hyangsook Lee, I. Min Lee, Won Tae Kang, Boo Heung Lee, Kunnyun Kim, Jinseong Heo, Seongjun Park, Young Hee Lee, Woo Jong Yu
ADVANCED MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Won Tae Kang, Il Min Lee, Seok Joon Yun, Young Il Song, Kunnyun Kim, Do-Hwan Kim, Yong Seon Shin, Kiyoung Lee, Jinseong Heo, Young-Min Kim, Young Hee Lee, Woo Jong Yu
Article
Chemistry, Physical
Ui Yeon Won, Thuc Hue Ly, Young Rae Kim, Won Tae Kang, Yong Seon Shin, Ki Young Lee, Jin Seong Heo, Kun Nyun Kim, Young Hee Lee, Woo Jong Yu
Article
Chemistry, Multidisciplinary
Ilmin Lee, Won Tae Kang, Yong Seon Shin, Young Rae Kim, Ui Yeon Won, Kunnyun Kim, Dinh Loc Duong, Kiyoung Lee, Jinseong Heo, Young Hee Lee, Woo Jong Yu
Article
Chemistry, Physical
Huisu Jeong, Sung-Jin Lim, Srinath Chakravarthy, Kyoung Hwan Kim, Junhyeong Lee, Jin S. Heo, Hwiyeol Park
JOURNAL OF POWER SOURCES
(2020)
Article
Chemistry, Multidisciplinary
Yong Seon Shin, Kiyoung Lee, Dinh Loc Duong, Jun Seok Kim, Won Tae Kang, Ji Eun Kim, Ui Yeon Won, Ilmin Lee, Hyangsook Lee, Jinseong Heo, Young Hee Lee, Woo Jong Yu
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Hyangsook Lee, Duk-Hyun Choe, Sanghyun Jo, Jung-Hwa Kim, Hyun Hwi Lee, Hyun-Joon Shin, Yeehyun Park, Seunghun Kang, Yeonchoo Cho, Seontae Park, Taehwan Moon, Deokjoon Eom, Mirine Leem, Yunseok Kim, Jinseong Heo, Eunha Lee, Hyoungsub Kim
Summary: The study reveals that the high ferroelectricity observed in ultra-thin hafnium zirconium oxide films originates from textured grains with a (112) out-of-plane orientation. This discovery is expected to provide new insights for the design of future extremely small-scale logic and memory devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Duk-Hyun Choe, Sunghyun Kim, Taehwan Moon, Sanghyun Jo, Hagyoul Bae, Seung-Geol Nam, Yun Seong Lee, Jinseong Heo
Summary: A new topological class of domain walls in orthorhombic HfO2 was discovered, revealing an atomic-scale mechanism of polarization switching with unexpectedly low energy barriers of domain wall motion. This challenges previous beliefs and provides a strategy to reduce coercive fields in HfO2-based ferroelectric devices.
Article
Chemistry, Physical
Owoong Kwon, Seunghun Kang, Sanghyun Jo, Yun Do Kim, Hee Han, Yeehyun Park, Xiaoli Lu, Woo Lee, Jinseong Heo, Marin Alexe, Yunseok Kim
Summary: Ferroelectric materials have been widely used in various fields due to their switchable spontaneous polarization. With the decrease in characteristic sizes of devices and materials below the nanoscale, appropriate characterization tools have become essential. A novel method based on high-frequency AFM-PUND has been proposed for measuring polarization-voltage hysteresis loops, showing promising results in evaluating nanoscale polarization values of ferroelectrics.
Article
Multidisciplinary Sciences
Suraj S. Cheema, Nirmaan Shanker, Li-Chen Wang, Cheng-Hsiang Hsu, Shang-Lin Hsu, Yu-Hung Liao, Matthew San Jose, Jorge Gomez, Wriddhi Chakraborty, Wenshen Li, Jong-Ho Bae, Steve K. Volkman, Daewoong Kwon, Yoonsoo Rho, Gianni Pinelli, Ravi Rastogi, Dominick Pipitone, Corey Stull, Matthew Cook, Brian Tyrrell, Vladimir A. Stoica, Zhan Zhang, John W. Freeland, Christopher J. Tassone, Apurva Mehta, Ghazal Saheli, David Thompson, Dong Ik Suh, Won-Tae Koo, Kab-Jin Nam, Dong Jin Jung, Woo-Bin Song, Chung-Hsun Lin, Seunggeol Nam, Jinseong Heo, Narendra Parihar, Costas P. Grigoropoulos, Padraic Shafer, Patrick Fay, Ramamoorthy Ramesh, Souvik Mahapatra, Jim Ciston, Suman Datta, Mohamed Mohamed, Chenming Hu, Sayeef Salahuddin
Summary: This study reports a new method utilizing HfO2-ZrO2 superlattice heterostructures as gate stacks, which does not require scavenging the interfacial SiO2 and can provide lower leakage current and no mobility degradation.
Article
Chemistry, Multidisciplinary
Young-Hoon Kim, Sang-Hyeok Yang, Myoungho Jeong, Min-Hyoung Jung, Daehee Yang, Hyangsook Lee, Taehwan Moon, Jinseong Heo, Hu Young Jeong, Eunha Lee, Young-Min Kim
Summary: Efficient and automated methodology is developed for large-scale mapping of crystal symmetries in polycrystalline Hf0.5Zr0.5O2 thin films, contributing to the progress in phase stabilization and switching behavior research.
Proceedings Paper
Engineering, Electrical & Electronic
D-H Choe, H. Bae, H. Lee, Y. Lee, T. Moon, S. G. Nam, S. Jo, H. J. Lee, E. Lee, J. Heo
Summary: This work presents an atomic-level understanding of the surface functionality of ferroelectric hafnia and its relation to FE properties, utilizing first-principles calculations. A new algorithm was devised to automatically find stable geometries of functionalized hafnia surfaces, overcoming challenges in modeling complex bonding chemistry. Results show that crystallographic orientations in thin film hafnia can be engineered by surface functionalization, enabling control of polarization and coercive field for targeted applications.
2021 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Hagyoul Bae, Seung Geol Nam, Taehwan Moon, Yunseong Lee, Sanghyun Jo, Duk-Hyun Choe, Sangwook Kim, Kwang-Hee Lee, Jinseong Heo
2020 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
S. W. Hwang, S. Han, W. Lee, W. Chang, J. H. Song, S. J. Kim, S. Park, H. J. Shin, J. Heo, Y. S. Choi, T. Ha, D. Lee, H. Lee, J. Lee, R. Ashcraft, G. H. Koh, H. K. Kang
2020 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM)
(2020)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)