JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Jun Wei,Zhijie Guo,Fei Wang,Xianyi Zhao,Sihan Chen,Xinyao Zhang,Xinyao Wang,Ye Liang,Xiaobing Wang
Uncontrolled side reactions between lithium metal and organic electrolytes seriously deteriorates the stability of corresponding battery due to the non-uniform Li + deposition. Using lithium nitrate (LiNO 3 ) as an additive can adjust the components in solid-electrolyte-interphase (SEI) for optimizing of lithium metal interface . However, the low solubility and rapid consumption of LiNO 3 in ester-based electrolytes limit its further application. Herein, a kind of suspension electrolyte containing micron-sized LiNO 3 particles is reported to realize a full gradient compensation against the consumption of NO 3 − . Benefiting from the uniformly dispersion of LiNO 3 particles, a SEI layer containing even-distributed Li 3 N and LiN x O y with high content is constructed that promotes the rapid and uniform plating of Li + . Consequently, the Li/Cu batteries present a polarization of only 15–20 mV, and exhibit a consistent performance for 230 cycles with the CE of 98.1%, which is 4 times than that of conventional carbonate electrolytes. In addition, the cycling life of the assembled Li/NCM811 batteries can be extended to 260 cycles with a high capacity retention of 82.4 %.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Simeng Wang,Youchun Yu,Shaotong Fu,Hongtao Li,Jiajia Huang
The absence of control over carriers transport during electrochemical cycling, accompanied by the deterioration of the solid electrolyte interphase (SEI) and the growth of lithium dendrites, has hindered the development of lithium metal batteries. Herein, a separator complexion consisting of polyacrylonitrile (PAN) nanofiber and MIL-101(Cr) particles prepared by electrospinning is proposed to bind the anions from the electrolyte utilizing abundant effective open metal sites in the MIL-101(Cr) particles to modulate the transport of non-effective carriers. The binding effect of the PANM separator promotes uniform lithium metal deposition and enhances the stability of the SEI layer and long cycling stability of ultra-high nickel layered oxide cathodes. Taking PANM as the Li || NCM96 separator enables high-voltage cycling stability, maintaining 72% capacity retention after 800 cycles at a charging and discharging rate of 0.2 C at a cut-off voltage of 4.5 V and 0 °C. Meanwhile, the excellent high-rate performance delivers a specific capacity of 156.3 mA h g −1 at 10 C. In addition, outstanding cycling performance is realized from −20 to 60 °C. The separator engineering facilitates the electrochemical performance of lithium metal batteries and enlightens a facile and promising strategy to develop fast charge/discharge over a wide range of temperatures.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2022
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IF 20.831
Yan Liu,Yuan Li,Long Chen,Fang Yan,Zhihong Lin,Junmou Wang,Jingyi Qiu,Gaoping Cao,Biyan Wang,Hao Zhang
For high-specific energy Li batteries, hybrid anodes with graphite and Li metal are promising. However, the degradation of graphite-Li metal hybrid anodes during long cycles has been significantly fastened by dendritic Li growth and dead Li accumulation ascribed to the inferior solid electrolyte interphase (SEI). Efficient material construction strategies are highly demanded to inhibit the deactivation of graphite intercalation compounds (GICs: LiC 12 , LiC 6 , etc.) in graphite-Li metal hybrid anodes. Here, we introduced a physical-chemical modification strategy. Which is acted by a combination of a LiF-rich and elastic SEI and preset void in the composite electrodes, which was realized by Cu mesh current collectors, resulting in the retardant of the accumulation of dead Li and side reaction sediments on graphite surface and the retaining of the Li + insertion channels. The strategy ensured the long-term activity of both GICs and Li metal in graphite-Li metal hybrid anodes. Thus, the hybrid anodes obtain higher reversibility of both the lithium-ion insertion/deintercalation and Li metal deposition/dissolution processes. The batteries can maintain a specific capacity of up to 500 mAh/g, with an average CE of 98.5% for 85 cycles. This work presents a novel and effective methodology to realize the high reversibility of the high-capacity graphite-Li metal hybrid anodes.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 13
·期 1
·730-742
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IF 10.7
Chen Cheng,Rendang Yang,Yang Wang,Xiaohui Guo,Jie Sheng
Inherently insulating and thermally stable nanocellulose membranes are prone to forming a three-dimensional porous structure, which is conducive to storing large amounts of electrolyte and providing ion migration pathways. However, the infiltration of polar electrolytes can compromise the mechanical strength of the nanocellulose membrane by disrupting hydrogen bonding, leading to a suboptimal interface and cycling stability of the batteries. This study effectively improves the mechanical strength and electrochemical performance of bacterial cellulose (BC) based separators by in situ constructing a dual-network structure polymerized from poly(ethylene glycol) diacrylate (PEGDA) and acrylic acid (AA). The distinctive dual-network structure not only significantly enhances the wet strength of the BC separator but also introduces a polymer-coordination transport mechanism, building upon the original lithium-ion pore transport system. The transport of lithium ions is regulated by the ether, ester and carboxyl groups in the polymer network, so that they are uniformly deposited on the surface of the lithium metal negative electrode, and finally form an SEI layer dominated by LiF, which greatly reduces the side reactions between the electrolyte and the electrode. The assembled lithium symmetric battery exhibits stable lithium deposition/stripping behavior, and the cycle stability and rate performance are far superior to those of commercial PP separators.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
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IF 4.65
Rumeng Wang,Dongjin Feng,Tianhua Chen,Shimou Chen,Yuwen Liu
In this paper, we report a mussel-inspired polydopamine coating on the Si/C electrode via a simple immersion process to improve the electrochemical performance such as cycle stability and rate capability. The nanometer-thick polydopamine coating layer enables fast Li + transport at the interfaces and takes part in the formation of SEI due to the electron-rich amine group. The PD coated Si/C electrode exhibits good performance in long cycling test. Compare with the uncoated Si/C electrode, the capacity retention of the coated electrode is improved from 59.5% to 80% after 200 cycles. X-ray photoelectron spectroscopy, transmission electron microscopy and scanning electron microscopy prove that PD coating really promotes the formation of uniform and dense SEI and reduces cracks on the electrode surface. Meanwhile, the pulverization of electrodes which breaks the electrical contact with the current collector is alleviated.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Metals
·
2023
·Vol. 13
·期 4
·658
·
IF 2.9
Zhen Feng,Ruoxuan Chen,Rui Huang,Fangli Zhang,Weizhen Liu,Sailin Liu
Phosphorus-based materials are considered to be reliable anode materials for potassium ion batteries (PIBs) due to their high theoretical capacity but suffer from inferior cycling stability and an unstable Solid Electrolyte Interface (SEI) layer. Herein, optimized ball-milled parameters and concentrated electrolytes are introduced to enhance the electrochemical performance of Sn4P3/C anodes. Consequently, the electrodes synthesized under optimized ball milling parameters could deliver a reversible capacity of 307.8 mA h g−1in diluted Potassium hexafluorophosphate (KPF6) electrolyte. Moreover, compared with diluted bis(fluorosulfonyl)imide (KFSI) electrolyte, a robust inorganic KF-rich SEI layer can be formed on the electrode’s surface by employing concentrated KFSI electrolyte and provides more rapid K ion conduction rates. Meanwhile, a large proportion of the FSI−anions participated in the K+solvation shell when the KFSI concentration increased. As a result, high specific capacities (225.1 mA h g−1at 50 mA g−1after 200 cycles) and excellent Coulombic efficiency (97.24% at 500 mA g−1after 200 cycles) can be achieved. This work may deepen our understanding of synthetic optimization in electrode material design and the role of concentrated electrolyte in tunning the solvation structure, and also offer an insightful clue to the design of high-capacity phosphorus-based anodes.Keywords:phosphorus-based anode;ball-milling;concentrated electrolyte;solvation structure;SEI layer
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Juan Wang,Siwen Jin,Zhengqiu He,Debin Kong,Han Hu,Xiang Feng,De Chen
The low effective capacity, inferior initial Coulombic efficiency, and unstable solid electrolyte interface (SEI) of silicon oxycarbide (SiOC) materials in lithium-ion batteries (LIBs) pose significant challenges for the widespread application. Herein, to circumvent these issues, a micron-sized SiOC-based anode with 3D structure is constructed by Si and Cu co-doping using solvent-free ball milling for high-performance LIBs. The Cu 3 Si alloy is formed in situ as an intermediate that is anchored to the surface of Si within the SiOC matrix. The unique 3D SiOC-based anode with Cu 3 Si interphase provides fast electron conductivity and high mechanical strength, while facilitating the formation of a robust and LiF-rich SEI. Specifically, the SiOC-based anode delivers excellent cyclic stability and rate capability (750.0 mAh g −1 for 1000 cycles at 1 A g −1 ). Notably, the full cells equipped with an NCM811 cathode maintain this cyclic stability, achieving a 93.0% capacity retention after 150 cycles. This work provides insights into the rational fabrication of a 3D micron-sized SiOC-based anode with an in situ generated Cu 3 Si interphase for advanced LIBs and beyond.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2021
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IF 9.594
Zidong Chen,Lun Li,Zheng Zhang,Hao Li,Bo Xie,Yungui Chen,Ali Davoodi,Saman Hosseinpour,Wei Liu
Pulverization and surface instability have been identified as the main impediments to the application of Si anodes in high-energy lithium-ion batteries (LIBs). In this study, a Si-graphitic carbon hybrid (SiG) is created via embedding Si nanoparticles in between expanding graphite interlayers, thus to be adopted as a model system to unravel structure-properties relations for LIBs applications. We explore the impact of artificial surface coating layers on the lithium cycling performance of SiG particles. In comparison with native SiG and carbon-coated SiG (CC-SiG), we find that the “sticky-carbon” coating, i.e., an epoxy-rich layer on top of the carbon coating, gave rise to superior cycle performance. In the “sticky carbon” coated SiG (SCC-SiG), the surface chemistry appears to have a pivotal role in both alleviating electrode disintegration and forming a favorable SEI rich in fluorine-polymers. These positive findings are examined in electrodes with mass loading ranging from 1.0 to 5.0 mg/cm 2 , achieving area capacities up to ∼5.0 mAh/cm 2 . A full cell adopting >6 mg/cm 2 LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode and SCC-SiG delivers stable cycling performances. It is hence unraveled that the carbon coating layer with reactive surface groups on the top is an unrecognized key for wide range of Si-based anodes.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 6
·2754-2768
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IF 14.511
Fulu Chu,Jie Lei,Rongyu Deng,You Zhou,Feixiang Wu
Lithium metal anodes (LMAs) are being researched to enhance their potential as ideal candidates for high-energy-density rechargeable batteries. However, an unstable solid–electrolyte interphase (SEI) layer and dendrite formation severely hinder their practical operations due to poor coulombic efficiency (CE) and potential security risks. Herein, an artificial SEI layer with various inorganic species was constructed via a strategy involving pre-planting various salt anions on the LMA. The as-prepared layer with multifunctional properties could stabilize liquid–electrode interfaces and proactively regulate even distribution and facilitate the homogeneous diffusion of the ion flux. Moreover, the anion-release behavior of this layer would be an additional attribute that could compensate for the anion consumption during cycling. As a result, the performance of modified LMAs could be significantly improved via this artificial SEI. Li–Cu cells provided CEs of above 98% among a range of current densities with long lifespans, and the symmetric cells showed stable cycling for over 1800 h at 1 mA cm−2. In practice, an assembled LiFePO4/Li cell displayed excellent cyclability of over 1000 cycles with high CEs at 2C. This strategy via., anions-planting protection mechanisms sheds light on tuning robust artificial SEI layers and can offer a fresh perspective to guide the design of high-performance LMAs.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ridong Hu,Lewen Yang,Caixia Zhang,Bijun Chen,Hucan Hong,Haodong Shen,Chong Mao,Zihao Yang,Shuying Zhang,Qiujie Huang,Yang Li,Wenhong Ruan,Fujie Yang
Sodium-ion batteries (SIBs) are viable contenders for large-scale energy storage systems owing to the plentiful supply of sodium resources. However, the poor stability of electrolyte/ electrode interface severely limits the cycle life of SIBs. Herein, sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (NaTFPB), a boron-centered fluorinated organic sodium salt, is used as a bifunctional additive in the Base electrolyte (NaPF 6 in EC/DMC/FEC) for NaNi 0.33 Fe 0.33 Mn 0.33 O 2 ||hard carbon pouch cells. Theoretical simulations and experimental studies demonstrate that NaTFPB modulates the first solvation shell structure of Na + and undergoes preferential redox reactions at both electrodes simultaneously. This behaviour contributes to the formation of robust interfacial layers. As a result, uniform and stable cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) layers, enriched with NaF and boron compounds, are formed. The Ah-scale pouch cell with NaTFPB exhibits a high capacity retention of 79 % after 500 cycles at 1 C rate under room temperature. Remarkably, under harsh operational stress combining elevated temperature (45 °C) and an upper high cutoff voltage of 4.1 V, the cell retains 96 % capacity retention over 250 cycles. Additionally, it exhibits excellent low-temperature discharge capability at −20 °C. This innovative design of functional additive addresses interfacial stability challenges, advancing high-energy–density SIBs for practical applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 34
·18138-18147
·
IF 8.867
Kaiqiang Zhou,Meiling Kang,Xiaoqing He,Zhensheng Hong,Zhigao Huang,Mingdeng Wei
Electrode pulverization, low electrochemical reaction kinetics and an unstable SEI layer have prevented the application of transition metal oxides with a conversion-type mechanism. Here, we describe gum arabic (GA) as a green and multi-functional binder for the fabrication of a NiFe2O4 nanotube (NFNT) electrode enabling predominant application in LIBs and NIBs. Firstly, it's revealed that the NFNTs–GA electrode possesses better mechanical properties of a higher friction coefficient, better elastic resilience and higher reduced modulus and hardness compared with a NFNTs–PVDF electrode. Secondly, the NFNTs–GA electrode can restrain the side reactions between the electrode and electrolyte, leading to the formation of a remarkably stable and thin SEI layer during discharge and charge processes. Thirdly, it is demonstrated by KPFM that the NFNTs–GA electrode possesses improved surface electrical properties and lower energy for the escape of electrons. Consequently, the NFNTs–GA electrode demonstrates much improved rate capability, cycling stability and columbic efficiency when used as an anode material for LIBs. It displays a stable capacity of 770 mA h g−1 which can be retained after 500 cycles at 0.5 A g−1. More importantly, the NFNTs–GA electrode exhibits a high initial coulombic efficiency of 73% (only 48% for the NFNTs–PVDF electrode) and enhanced electrochemical reaction kinetics with significantly improved oxidation and reduction peaks in the application of NIBs.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Zhongxu Chen,Guancheng Xu,Jiahui Jiang,Qihao Wu,Shuai Liu,Yuying Feng,Yixuan Li,Li Zhang,Xian Sun
Poor stability caused by side reactions such as corrosion, Zn dendrite and hydrogen evolution are crucial factors hindering commercial application in queous zinc ion energy storage systems. This article offers a strategy, zinc-rich artificial solid electrolyte interphase (ASEI) layer with polar groups by imidazole-2-carboxaldehyde (2-ICA) electrolyte additive, which helps form stable electrode/electrolyte interface and rapid Zn 2+ transfer interface with low resistance. Firstly, the chelation with Zn 2+ of 2-ICA and its zincophilic capability enable the rapid formation of the ASEI layer and result in more sites for initial nucleation, which then guides the uniform Zn 2+ deposition. Additionally, the introduced ASEI with polar groups accelerates the de-solvation kinetics of Zn 2+ and the Zn 2+ transfer ability in electrode/electrolyte interface, which enable high-rate charge and discharge. Therefore, the symmetric battery based on 2-ICA electrolyte exhibits excellent cycling stability at 20 mA cm −2 (cycling up to 800 h). At the same time, assembled Zn//Cu also has a high average Coulombic efficiency (99.2 %). The zinc-ion hybrid capacitors (ZICs) assembled based on this electrolyte also exhibit outstanding electrochemical properties. This work offers a simple and novel way to realize high performance and great safety zinc-based energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）