ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaodi Li,Yantao Zhang,Yaying Dou,Zhiyi Zhao,Xiaoyun Fan,Haichao Jiang
Lithium metal is widely utilized due to its high theoretical capacity and low electrochemical potential. However, the growth of uncontrollable lithium dendrites and increased voltage polarization during lithium stripping and plating can severely impact cycling stability. In this study, we propose a nitrogen-rich triazinyl nanoporous organic polymer (DCP-CTF) as an artificial solid–electrolyte interphase (SEI) for a lithium-metal anode. The spatial distribution of the porous layered array structure enables the gradient migration of Li+. Meanwhile, the rigid nanochannels can also restrict the excessive growth of Li depositions through the steric confinement effect and reduce the generation of lithium dendrites. By combining density functional theory calculations with Fourier transform infrared spectroscopy, we demonstrate the functional lithiophilic coordination of DCP-CTF. The electron-rich triazine ring acts as a donor to attract Li+, and the pyridine nitrogen group serves as an effective lithium anchoring site. The abundant distribution of these lithiophilic sites can regulate Li+ transfer, thereby ensuring smooth lithium deposition and inhibiting dendrite formation. As a result, the DCP-CTF-modified lithium-metal anode exhibits exceptional electrochemical stability of more than 2500 h of cycling in an ether-based electrolyte at a high current density of 20 mA cm–2.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 29
·18127-18136
·
IF 10.7
Jing Tao,Can Zhang,Xueyang Li,Xinlong Chen,Chenzhen Ji,Wang Wan,Chao Wang
Lithium metal anodes tend to form non-uniform Li deposition that causes dendrite growth during cycling. Meanwhile, the deposition and dissolution of lithium metal often results in the continuous formation and breakdown of the SEI. Additionally, the use of thick lithium metal often results in an excessive inventory of lithium, which diminishes the energy advantage of lithium metal. Fabricating thin lithium foils is challenging owing to the low mechanical strength of lithium metal. To address these issues, we employed an in situ structural regulation strategy to prepare high-performance lithium metal batteries. The mechanical strength of the prepared LiF@LiZn10/Li foil was significantly enhanced, allowing it to be thinned down to a thickness of 5 μm, accompanied with great air stability. Moreover, the in situ formation of LiZn alloys improved Li-deposition behavior. Furthermore, we demonstrated the participation of LiF particles in the in situ formation of the SEI, which facilitated Li+-transport kinetics. The LiF@LiZn10/Li electrode demonstrated significantly enhanced cycling performance by synergistically improving Li-deposition behavior and optimizing the SEI layer in situ. The LiF@LiZn10/Li foil electrode exhibited a long cycling life of over 1300 h at 1 mA cm−2 and 1 mA h cm−2. When coupled with a commercial LiFePO4 cathode (3.3 mA h cm−2), the LiFePO4‖LiF@LiZn10/Li cell exhibited a cycle life approximately thrice that of the cells with LMBs. This work provides a novel strategy to optimize LMAs for next-generation LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 13
·1907163
·
IF 11.459
Rongxiang Hu,Huayu Qiu,Huanrui Zhang,Peng Wang,Xiaofan Du,Jun Ma,Tianyuan Wu,Chenglong Lu,Xinhong Zhou,Guanglei Cui
Lithium (Li) metal batteries (LMBs) are enjoying a renaissance due to the high energy densities. However, they still suffer from the problem of uncontrollable Li dendrite and pulverization caused by continuous cracking of solid electrolyte interphase (SEI) layers. To address these issues, developing spontaneously built robust polymer-reinforced SEI layers during electrochemical conditioning can be a simple yet effective solution. Herein, a robust homopolymer of cyclic carbonate urethane methacrylate is presented as the polymer matrix through an in situ polymerization method, in which cyclic carbonate units can participate in building a stable polymer-integrated SEI layer during cycling. The as-investigated gel polymer electrolyte (GPE) assembled LiCoO 2 /Li metal batteries exhibit a fantastic cyclability with a capacity retention of 92% after 200 cycles at 0.5 C (1 C = 180 mAh g −1 ), evidently exceeding that of the counterpart using liquid electrolytes. It is noted that the anionic ring-opening polymerization of the cyclic carbonate units on the polymer close to the Li metal anodes enables a mechanically reinforced SEI layer, thus rendering excellent compatibility with Li anodes. The in situ formed polymer-reinforced SEI layers afford a splendid strategy for developing high voltage resistant GPEs compatible with Li metal anodes toward high energy LMBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Li Gao,Dujiang Lu,Yinghui Yang,Rongzhang Guan,Dongmei Zhang,Chenyi Sun,Shuai Liu,Xiufang Bian
A simple synthesis has been proposed for seaweed-like amorphous TiO 2-x modified Sb (a-TiO 2-x /Sb) composite nanowires as sodium-ion battery (SIBs) anodes by a dealloying method of Al-Sb-Ti alloys. Compared with other conventional methods, this method has the advantages of simple preparation, high yield and easy large-scale synthesis. It is excitingly discovered that a-TiO 2-x /Sb effectively alleviates volume changes and stabilizes the solid electrolyte interface (SEI). The a-TiO 2-x /Sb nanowires electrodes deliver outstanding electrochemical performance based on the synergistic effects, exhibiting a high reversible capacity of 591.9 mA h g −1 at 100 mA g −1 , stable cycling performance with a high capacity retention of 96.4% after 200 cycles and superior rate capability 382.2 mA h g −1 at 10,000 mA g −1 , which is very competitive among the reported Sb-based anodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 36
·2303020
·
IF 19
Yi Sun,Kuanxin Zhang,Run Chai,Yueda Wang,Xianhong Rui,Kang Wang,Huaxia Deng,Hongfa Xiang
Considered the promising anode material for next-generation high-energy lithium-ion batteries, SiO x has been slow to commercialize due to its low initial Coulombic efficiency (ICE) and unstable solid electrolyte interface (SEI) layer, which leads to reduced full-cell energy density, short cycling lives, and poor rate performance. Herein, a novel strategy is proposed to in situ construct an artificial hybrid SEI layer consisting of LiF and Li 3 Sb on a prelithiated SiO x anode via spontaneous chemical reaction with SbF 3 . In addition to the increasing ICE (94.5%), the preformed artificial SEI layer with long-term cycle stability and enhanced Li + transport capability enables a remarkable improvement in capacity retention and rate capability for modified SiO x . Furthermore, the full cell using Li(Ni 0.8 Co 0.1 Mn 0.1 )O 2 and a pre-treated anode exhibits high ICE (86.0%) and capacity retention (86.6%) after 100 cycles at 0.5 C. This study provides a fresh insight into how to obtain stable interface on a prelithiated SiO x anode for high energy and long lifespan lithium-ion batteries.
研究领域:
电化学
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材料科学
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能源存储
·
锂离子电池
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界面化学
·
纳米材料
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Lan Zhang,Kaihang Zhang,Zhaohui Shi,Suojiang Zhang
Li4Ti5O12 (LTO) is a promising anode material for electric vehicles (EVs) and electrochemical energy storage applications because of its safety, good rate capability, and long cycle life. At elevated temperature, such as 60 °C, it always shows poor cycle performance because of the instability between the electrode material and electrolyte, which may also lead to a serious gassing issue. In this article, a facile hydrothermal method is adopted to coat the LTO powder with a thin LiF layer, in which the LiF acts as an artificial solid electrolyte interface (SEI) layer to prevent the direct contact of LTO and electrolyte, thus improving the high-temperature cycle performance. Electrochemical tests prove that the LiF coating layer has no influence on the kinetics at ambient temperature and greatly enhances the high-temperature cycle stability, and the LTO@LiF composite material keeps 87% of its initial discharge capacity in 300 1C cycles at 60 °C. Moreover, the LiF coating layer exhibits a special self-driven reforming process during the initial cycles, which makes it uniform and more effective at enhancing the stability between electrode/electrolyte interfaces.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Fuyang Jiang,Yi Sun,Kuanxin Zhang,Yongchao Liu,Xuyong Feng,Hongfa Xiang
SiO x is considered to be a promising anode material for lithium-ion batteries (LIBs) due to the high lithium storage capacity. However, the large initial irreversible capacity loss and intensive volume change during cycling hinder its commercial applications. Prelithiation is an effective and convenient strategy to improve the initial Coulombic efficiency (ICE) of SiO x , while incomplete and unstable SEI on the prelithiated anode still results in rapid capacity decay. Herein, through the synergy effect of chemical pre-lithiation process and fluoroethylene carbonate reduction, a compact and stable LiF-rich SEI layer is in-situ formed on the surface of prelithiated SiO x anode. The modified SiO x anode exhibits a high ICE of 90.7% with good cycling performance. When paired with the commercial LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode, the assemble pre-Li-SiO x /C||NCM622 full cell exhibit a high ICE of 85.7% and stable cycling stability. This work provides a new insight in constructing favorable SEI in pre-lithiation process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 10
·e202300186
·
IF 8.4
Hanxiao Zhou,Tianhui Li,Wenjing Liu,Zhihao Guo,Zihao Su,Jingjing Gao,Meizhen Qu,Gongchang Peng
Graphical Ineffable : As an additive for lithium anodes, N , O -bis(trimethylsilyl)acetamide is proposed to suppress the appearance of lithium dendrites and volume expansion. With the high-voltage (4.3 V) and high-loading (6 mg cm −2 ) NCM622 cathode, the full battery shows excellent cycling performance. It has superior properties that enable the development of lithium metal batteries in practical applications. Owing to the strong energy advantage of lithium anodes, the development of lithium-metal batteries has become an inevitable trend. However, plagued by the instability of solid-electrolyte interphase (SEI) films, lithium metal anodes face challenges such as lithium dendrite formation and volume expansion. Studies have proven that modulating the composition and structure of SEI films by using electrolyte additives is a convenient and valid method. Currently, it is widely accepted that fluoride is an effective additive but, based on the high cost of fluoride production and environmental concerns, the development of fluoride-free additives is of great significance. In this work, the bifunctional additive N , O -bis(trimethylsilyl)acetamide (BSA) is proposed, which can build up a SEI layer that is rich in SiO x and Li 3 N on the surface of the lithium anode to control the deposition behavior of lithium and clean the electrolyte of HF to protect the electrode. The experimental results indicate that BSA suppresses the generation of lithium dendrites and controls the volume expansion of lithium anodes. Moreover, compared with the commonly used carbonate electrolytes, the battery containing BSA has the best overall performance. Methodologically, the results can be extended to other additives containing Si−O functional groups to replace the same type of fluorine-containing additives.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 11
·2004711
·
IF 30.849
Yuxuan Liu,Renzong Hu,Dechao Zhang,Jiangwen Liu,Fang Liu,Jie Cui,Zuopeng Lin,Jinsong Wu,Min Zhu
To achieve high ionic conductivity for solid electrolyte, an artificial Li-rich interface layer of about 60 nm thick has been constructed in polymer-based poly(ethylene oxide)-lithium bis(trifluoromethanesulfonyl)imide composite solid electrolyte (briefly noted as PEO m ) by adding Li-based alloys. As revealed by high-resolution transmission electron microscopy and electron energy loss spectroscopy, an artificial interface layer of amorphous feature is created around the Li-based alloy particles with the gradient distribution of Li across it. Electrochemical analysis and theoretical modeling demonstrate that the interface layer provides fast ion transport path and plays a key role in achieving high and stable ionic conductivity for PEO m -Li 21 Si 5 composite solid electrolyte. The PEO m -5%Li 21 Si 5 composite electrolyte exhibits an ionic conductivity of 3.9 × 10 –5 S cm −1 at 30 ° C and 5.6 × 10 −4 S cm −1 at 45 ° C. The LiFePO 4 | PEO m -5%Li 21 Si 5 | Li all-solid-state batteries could maintain a stable capacity of 129.2 mA h g −1 at 0.2 C and 30 ° C after 100 cycles, and 111.3 mA h g −1 after 200 cycles at 0.5 C and 45 ° C, demonstrating excellent cycling stability and high-rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Dan Li,Changyan Zhu,Min Zhang,Ying Wang,Ziye Kang,Yulong Liu,Jun Liu,Jia Liu,Haiming Xie
How to develop a homogeneous redox mediator (RM) towards both ORR and OER and how to prevent the shuttle effect are two main issues for Li-O 2 batteries thus far. Here, we firstly report 1,2-dimethyl-3-propylimidazolium iodide (DMPII), which serves multiple functions as a RM for discharge capacity promotion, a RM for charge potential reduction, and a Li anode protector for shuttling suppression by in situ generating a “self-defensed” SEI layer. Benefiting from these advantages, a cell with DMPII displays a stable cyclability with a low terminal charge potential of ~3.6 V till the cell death, a considerable rate performance, and a good reversibility associated with Li 2 O 2 formation and degradation. Based on the experimental and density functional theory (DFT) calculation results, a working mechanism for a cell operation is also proposed. These results represent a promising progress in the development of multiple-functional RM for Li-O 2 batteries. Moreover, we expect that this work gives an insight into the in situ protection of Li metal anode for board applications ( e.g., Li-S batteries, all-solid-state Li-ion batteries, etc. ).
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 44
·2102347
·
IF 13.281
Shuai Zheng,HaiYan Zhang,JinChen Fan,QunJie Xu,YuLin Min
Achieving uniform Li deposition is vital for the construction of a safe but also efficient Li-metal anode for Li-metal batteries (LMBs). Herein, a facile coating strategy is used for forming an ultra-thin aramid nanofiber (ANF) membrane, with a network structure, on a Li anode (ANF-Li) as an artificial layer inhibiting Li dendrite's growth. The results show that under an ultra-high current density of 50 mA cm −2 , the ANF-Li|ANF-Li symmetric cells can be kept stably cycled for a period exceeding 300 h. The ANF-Li|LiFePO 4 full cells exhibit a high-capacity retention of 80.1% after 1200 cycles at 1 C, showing a promising potential for LMBs application. Combined experimental results with theoretical calculations, the excellent performance of the ANF-Li anode is explored. Lithiophilic polar functional groups (CO, N H) appear in the surface and structure of ANF membrane, which offer high-concentration functional sites for the Li ions to realize an effective adhesion at the molecular level. This work also finds fiber-shaped lithium deposition for the first time. Furthermore, the nanoscale porosity of the ANF membrane not only provides fast pathways and channels for the diffusion of the electrolyte and Li transportation, but also eliminates the “weak links” of micron-scale Li dendrites penetrating the membrane.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Tiantian Fang,Huibin Liu,Xinyu Luo,Mengru Sun,WenChao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Constructing a stable and robust solid electrolyte interphase (SEI) has a decisive influence on the charge/discharge kinetics of lithium-ion batteries (LIBs), especially for silicon-based anodes which generate repeated destruction and regeneration of unstable SEI films. Herein, a facile way is proposed to fabricate an artificial SEI layer composed of lithiophilic chitosan on the surface of two-dimensional siloxene, which has aroused wide attention as an advanced anode for LIBs due to its special characteristics. The optimized chitosan-modified siloxene anode exhibits an excellent reversible cyclic stability of about 672.6 mAh g −1 at a current density of 1000 mA g −1 after 200 cycles and 139.9 mAh g −1 at 6000 mA g −1 for 1200 cycles. Further investigation shows that a stable and LiF-rich SEI film is formed and can effectively adhere to the surface during cycling, redistribute lithium-ion flux, and enable a relatively homogenous lithium-ion diffusion. This work provides constructive guidance for interface engineering strategy of nano-structured silicon anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）