IONICS
·
2021
·Vol. 27
·期 7
·2867-2876
·
IF 2.817
Yu Juan,Peng Jiaxin,Huang Wenlong,Wang Lejie,Wei Yinbo,Yang Naixing,Li Linbo
A Li 2 MoO 4 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode material was successfully synthesized by introducing Mo source during the lithium mixing process. The influence of Li 2 MoO 4 -coating on the structure, morphology, and electrochemical performance related to LiNi 0.8 Co 0.1 Mn 0.1 O 2 has been studied. The results of the cyclic voltammetry (CV) and differential voltage curve measurement show that the electrode polarization and irreversible capacity of the modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 are smaller than the virgin material. Meanwhile, the capacity retention of LiNi 0.8 Co 0.1 Mn 0.1 O 2 increases from 64.6 to 90.59% after the 100th cycle at 1 C (1 C=200 mA g −1 ). Additionally, compared with the recycled materials, a thinner solid electrolyte interface (SEI) film was formed on the modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 material. The improvement of the electrochemical performance for LiNi 0.8 Co 0.1 Mn 0.1 O 2 is mainly due to the existence of the Li 2 MoO 4 protective shell that improves the structural stability of the core material, avoids direct contact between the electrolyte and the active material, and suppresses the occurrence of side reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 10
·4813-4824
·
IF 2.394
Zhao Liuyang,Jing Dong,Shi Yueli,Zhuang Quanchao,Cui Yongli,Ju Zhicheng,Cui Yanhua
In this study, TriMethylene sulfite (TMS) was evaluated as a new electrolyte additive for improving the performances of lithium-ion batteries (LIBs). Charge-discharge, cyclic voltammetry (CV), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS) were used to analyze the electrochemical reaction processes. The results showed that the initial charge capacities of the graphite electrode in electrolytes without and with TMS were 332.54 and 362.93 mAh g −1 , respectively. After 100 cycles, the charge capacities were 321.05 and 353.4 mAh g −1 and the capacity retention rates were 96.6 and 97.4%, respectively. The impedance of the electrode in the electrolyte with TMS was reduced. These improvements in performance were benefited from the effective formation of a stable, compact, and smooth solid electrolyte interface (SEI) film with low resistance.
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 Energy Storage
·
2024
·
IF 8.9
Qingyang Mei,Yutong Zhai,Feilong Dong,Yanju Gou,Haiming Xie,Yulong Liu
Soft-matter electrolytes have garnered significant attention due to their improved safety features, rendering them viable options for the creation of Li metal batteries with high energy densities. However, establishing effective interfacial contact between the electrodes and soft-matter electrolyte remains a significant challenge, necessitating modifications at the interface. In this study, we design an artificial composite electrolyte interphase (PEG-Cs SEI) on the surface of the Li metal anode to improve ion transport between the soft-matter electrolyte and Li metal. The PEG-Cs SEI layer exhibits high flexibility and mechanical strength, effectively mitigating the lithium dendrite growth and volume expansion. As a result, Li||Li cells assembled with PEG-Cs SEI-modified lithium metal anodes exhibit stable performance for more than 1700 h, maintaining small overpotential even at high current densities and capacities (2.45 mAh cm −2 ). With a LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode, the battery shows a capacity up to 182 mAh g −1 at first discharge with cut-off voltage of 4.5 V. Furthermore, in a pouch cell configuration, the battery achieves 100 % capacity retention over 90 cycles and successfully passes safety tests, without fire or smoke. Combining the modified lithium metal anode with soft-matter electrolytes paves a promising way for the effective implementation of high-energy-density Li metal cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Ping Li,Enmin Xu,Yingke Zhou,Jialu Liu,Zhongzhi Yuan,Xiaohui Tian
Lithium primary batteries with lithium metal anode are extensively applied in the portable appliances and electronic fields for the high specific energy and power, low self-discharge and wide operating temperature. However, the application of lithium metal anode causes the safety and stability issues. Herein, the pentafluoropyridine (C 5 F 5 N) was applied as an electrolyte additive in lithium primary battery, to construct a suitable surface layer on lithium anode to increase the stabilization and electrochemical performance . With C 5 F 5 N additive, the discharge capacity of the Li primary battery increases to 422.1 mAh/g at 0.01 C, compared to 62.2 mAh/g of the pristine battery. Meanwhile, the storage performance of the batteries was also greatly enhanced with the C 5 F 5 N additive. After stored for 60 days at room temperature, the Li primary battery with additive displays a specific discharge capacity of 180.7 mAh/g, much higher than the pristine battery without additive (43.6 mAh/g). The significant improvements in capacitive and storage performances are attributed to the additive induced inhibition of decomposition of solvents and lithium salts and tuning of SEI composition on lithium anode surface. The C 5 F 5 N is a promising electrolyte additive for the further development and application of high-performance Li primary batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Pengxian Li,Junfeng Ren,Caixia Li,Jiaxu Li,Kai Zhang,Tingting Wu,Bin Li,Lei Wang
Interface engineering is considered as an effective way to inhibit dendrite growth and side reactions in rechargeable zinc ion batteries (ZIBs). Herein, to explore the best treatment routes on how to construct multi-functional protective layers with MOF-based nanomaterials, defect-rich CeO 2 polycrystals are designed with Ce-MOF-808 precursor as ion-selective smart artificial SEI for ZIBs. Interestingly, crystal defects which can provide active sites for Zn 2+ transfer, are introduced to MOF-CeO 2 via pyrolysis. Furthermore, the negative Zeta potential gives high selectivity to cations and shielding effect to anions, inhibiting the side reactions. Besides, MOF-CeO 2 can promote the desolvation process of Zn[(H 2 O) 6 ] 2+ and balance Zn-ion flux by pores. Impressively, synergistic effects on dendrite inhibition by chemical stability, crystal defects, surface charge properties, and hierarchically porous structure are investigated comprehensively. Therefore, MOF-CeO 2 @Zn anode exhibited ultra-stable plating/stripping behavior (more than 3200 h) and high Coulomb efficiency (99.5 % at 2 mA cm −2 ). This multi-functional protective layer also significantly improves the overall performance of Zn||MnVO full battery, with high-capacity retention at 5 A/g after 10,000 cycles.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
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
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
ADVANCED MATERIALS
·
2024
·
IF 27.4
Ziyu Song,Mengyu Tian,Jing Zhu,Jiayi Chen,Wenfang Feng,Liubin Ben,Hailong Yu,Xuejie Huang,Michel Armand,Zhibin Zhou,Heng Zhang
The extremely high chemical reactivity of lithium metal (Li°) electrodes and its enormous volume change during repetitive cycles cause continuous interfacial degradations in prevailing organic electrolytes, thus deteriorating the cycling performances of rechargeable lithium metal batteries (LMBs). Herein, departing from traditional wisdom on the design of electrolyte components, a super SEI-forming anion (SSA), as an efficient percussor for building stable interphases on Li° electrode, is proposed. Comprehensive investigations related to the unique anion chemistry of SSA reveal that the sulfonate and polyfluoroalkyl functionalities synergistically contribute to uniform spatial distributions of designer interfacial species, greatly improving the surface coverage property and conformal ability of the resulting interphases. Consequently, the incorporation of SSA leads to significant improvements in the cyclability of Li° electrode (exceeding 575 mAh cm −2 before failure) and the corresponding rechargeable Li°||LiFePO 4 cells [a five-time increase in lifespan as compared to the benchmark cell with the popular SEI-forming anion bis(fluorosulfonyl)imide (FSI)]. The present work offers a paradigm shift to tame the notorious interfacial issues via upgraded anion chemistry, which can promote the practical development of rechargeable LMBs and other kinds of metal batteries.
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 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
·
材料科学
·
能源存储
·
锂离子电池
·
界面化学
·
纳米材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Leyi Guo,Feifei Huang,Muzhi Cai,Junjie Zhang,Guoqiang Ma,Shiqing Xu
The practical application of the metallic lithium anode is suppressed by the highly unstable interface between electrolytes and lithium metal during the process of lithium plating/stripping. A perfect solid electrolyte interphase (SEI) can inhibit detrimental parasitic reactions, thereby improving the cycling performance of the metallic lithium anode. In this work, a high-purity solid lithium difluorobis(oxalato) phosphate (LiDFOP) is synthesized and an outstanding organic–inorganic hybrid SEI is obtained in an ether-based electrolyte for the first time induced by LiDFOP. The preferential reduction of LiDFOP can form an SEI rich in LiF and LixPOyFz species, thereby improving the conductivity and stability of the SEI. In addition, cationic-induced ring-opening polymerization between LiDFOP and 1,3-dioxolane endows the SEI with excellent adaptability to the reiterative volume change of the metallic lithium anode. Therefore, the Li/Cu battery maintains a high coulombic efficiency of 98.37% at a current density of 2 mA/cm2 for 200 cycles, and the Li/Li symmetrical battery shows stable voltage hysteresis over 1000 h even under the condition of 5 mA/cm2. The Li/S battery fabricated employing the electrolyte with LiDFOP shows significant improvement of cycling performance as well. These results manifest that the formation of an organic–inorganic hybrid SEI from LiDFOP can be employed as a new strategy to overcome the problem from the unstable SEI in metallic lithium batteries.
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
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yicheng Zhong,Yuanmao Chen,Yifeng Cheng,Qinglu Fan,Huajun Zhao,Huaiyu Shao,Yanqing Lai,Zhicong Shi,Xi Ke,Zaiping Guo
Lithium metal anodes (LMAs) are critical for high-energy-density batteries such as Li–S and Li–O2 batteries. The spontaneously formed solid electrolyte interface on LMAs is fragile, which may not accommodate the cyclic Li plating/stripping. This usually will result in a low coulombic efficiency (CE), short cycle life, and potential safety hazards induced by the uncontrollable growth of lithium dendrites. In this study, we fabricate a Li alginate-based artificial SEI (ASEI) layer that is chemically stable and allows easy Li ion transport on the surface of LMAs, thus enabling the stable operation of lithium metal anodes. Compared to bare LMAs, the ASEI layer-protected LMAs exhibit a more stable Li plating/stripping behavior and present effective dendrite suppression. The symmetric Li∥Li cells with the ASEI layer-protected LMAs can stably run for 850 and 350 h at current densities of 0.5 and 1 mA cm–2, respectively. Additionally, the LiFePO4∥Li full cell with the ASEI layer-protected LMA exhibits a capacity retention of about 94.0% coupled with a CE of 99.6% after 1000 cycles at 4 C. We believe that this study of engineering an ASEI brings a new and promising approach to the stabilization of LMAs for high-performance lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
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
危险品化学品经营许可证（带存储）