JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Shiyou Li,Li Yang,Peng Wang,Zhaojuan Li,Wenbo Li,Haining Liu,Xiaoling Cui
A blank comparison group of lithium salt-free electrolyte system, replacing the lithium salt of electrolyte with a redox shuttle agent, is constructed to give targeted research on the single role of lithium bis(oxalate)borate (LiBOB) salt, especially of bis(oxalate)borate anions (BOB − ) in the film-forming process. By combining and comparing all available studies, such as attenuated total reflectance (IR-ATR), X-Ray photoelectron diffraction spectrum (XPS), electrochemical impedance spectrum (EIS), scanning electron microscopy (SEM) tests and quantum chemical calculation , the formation mechanism of the solid electrolyte interphase (SEI) film is proposed. Results reveal that the prior reduction of BOB − anions can postpone the reduction potential and hinder the decomposition rate of carbonate solvents, but promote the formation of a dense, conductive and effective SEI film. This work provides a novel way to investigate the film-forming mechanism and has guiding significance for revealing the effect of other kinds of lithium salts on the surface film formation.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Hongyu Qi,Jiaxin Han,Lin Xing,Jia Xu,Yushan Liu,Xun Wang,Tao Zhang,Yong Ma,Lingzong Meng
The phase equilibrium of the quinary system LiCl–Li2SO4–LiBO2–Li2B4O7–H2O at 323.15 K was studied with an isothermal dissolution method. The dry-salt phase diagram of the quinary system consists of one invariant point saturated with LiCl·H2O, Li2B4O7·3H2O, and LiBO2·2H2O, three univariant curves, and three crystallization regions saturated with Li2SO4·H2O corresponding to LiCl·H2O, Li2B4O7·3H2O, and LiBO2·2H2O. The J(H2O), J(Li2SO4), refractive index, and pH value change gradually with the changing concentration. Combining the equilibrium constants for boron-containing species, the pH values, and concentration of total boron, the boron-containing species distributions in the mixed solution in the system were calculated. The concentrations of B3O3(OH)52– and B5O6(OH)4– are very low and can be neglected. The boron-containing species distributions are mainly affected by m(LiCl) in the solution but less by m(Li2SO4). The results of the phase diagram and boron-containing species distribution in the quinary system can provide fundamental thermodynamic data for the extraction of lithium borate from brines.
研究领域:
物理化学
·
化学热力学
·
无机化学
·
溶液化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 16
·期 4
·e202201218
·
IF 9.14
Yunju Wang,Shunchao Ma,Hongyu Wang
Graphical The height of intercalation : Lithium difluoro(oxalato)borate is introduced to LiBF 4 -sulfolane (SL) solutions for dual-ion batteries, and the graphite electrodes’ storage behavior of anions is studied. Each anion can intercalate into graphite with SL, and different intercalation gallery heights are formed. Intermediate height is not observed, and species inside graphite are determined. Some previous studies have found the synergistic effect of mixed anions in dual-ion batteries (DIBs). In this work, both lithium tetrafluoroborate (LiBF 4 ) and lithium difluoro(oxalato)borate (LiDFOB) were dissolved in sulfolane (SL) solvent, and the resultant solutions were applied for DIBs. The storage behavior of mixed anions in natural graphite positive electrodes was investigated. In-situ X-ray diffraction measurements revealed both anions could participate in the formation of graphite intercalation compounds. Their evolution followed with the decreasing tendency of discharge capacities as the content of LiDFOB increased in solutions. The exchange of anions was discussed.
研究领域:
电化学
·
电池技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 30
·16152-16162
·
IF 14.511
Xin Dai,Kunyang Zou,Weitao Jing,Peng Xu,Junjie Sun,Shengwu Guo,Qiang Tan,Yongning Liu,Tengfei Zhou,Yuanzhen Chen
The electron-deficient property of the atoms in functional materials endow them with tunable adsorption and catalysis effects on polysulfides, thus improving the performance of lithium–sulfur batteries. In this work, Li2B4O7 nanoparticles, which have abundant electron deficiencies derived from the [BO3] Lewis acid units, were uniformly cladded in the carbon nanofibers (LBO–CNF) and employed as interlayers for Li–S batteries. This functionalized interlayer expressed a high adsorption energy of ∼3.6 eV for polysulfides (e.g., Li2S6 and Li2S4) and effectively suppressed the polysulfides' shuttle behavior, delivering a high reversible capacity of 1242.6 mA h g−1 at 0.2C and good cycling performance with a low fading rate of 0.068% per cycle at 1C, thus effectually inhibiting the phenomenon of self-discharge. Besides, the lithiation reaction kinetics was also effectively enhanced, enhancing the rate performance of the battery to 644 mA h g−1 at 5C. This work provides a new strategy to enhance the electrochemical performance of Li–S batteries by applying the compounds of electronic-deficiency B-species and functionalized carbon.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 43
·2205677
·
IF 19.924
Ziqiang Wu,Kaiwen Wang,Weiwei Sun,Zhipeng Li,Zhihong Ma,Yunfeng Zhu,Yongjin Zou,Yao Zhang
The safety issues oflithium-ion batteries provoke the development of highly secure solidelectrolytes. Hydride electrolytes owning the high electrochemical stabilityand anode compatibility may sufficiently relieve theconcerns of safety. However, the low ionic conductivity at room temperature hampersits further application. Herein, the strategy of defect-induced (BH 4 ) – deformation to achieve high ionicconductivity LiBH 4 /BN composite electrolyte is suggested. The theoreticalcalculations indicate that the volume of the (BH 4 ) – tetrahedron is expanded by 14%. Such atetrahedron deformation weakens the Li H interaction forces in LiBH 4 , and thus promotes the Li-ion migration. The LiBH 4 /BN composites are enabled to deliver lithium ionicconductivity of 1.15 × 10 –4 S cm –1 at 40 °C with a Li-ion transference number of 97%, persuading an excellent solidelectrolyte for all-solid-state batteries. The sub-surface of LiBH 4 offers the lowest migration barrier among all possiblechannels, paving the optimal way for Li-ion migration. Furthermore, the LiBH 4 /BN electrolytes supply excellent electrochemical stabilityand electrode compatibility. The utilized strategy of outfield induction (notonly defects) and ligand deformation (not only (BH 4 ) – ) may also be extended to other solid electrolytes.
研究领域:
材料科学
·
固态离子学
·
能源化学
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Zhejiang University-SCIENCE A
·
2016
·Vol. 17
·期 2
·155-162
·
IF 0.941
Zhao Xin-yue,Wang Jing-lun,Luo Hao,Yao Hu-rong,Ouyang Chu-ying,Zhang Ling-zhi
A novel organosilicon-based ionic plastic crystal, N,N,N ,-diethylmethyl- N -[(trimethylsilyl)methyl]ammonium bistrifluoromethane sulfonimide ([DTMA][TFSI]) was designed and synthesized as solid-state electrolyte for lithium-ion batteries. The chemical structure and the physical and electrochemical properties were characterized in detail. The ionic conductivity of [DTMA][TFSI] was improved significantly by doping with lithium oxalyldifluoroborate (LiODFB) and propylene carbonate (PC). An optimized plastic crystal composite ([DTMA][TFSI]:LiODFB:PC=8:1:1 in molar ratio) as a solid-state electrolyte exhibited a decent cycling stability in LiFePO 4 /Li half-cell, with a specific discharge capacity of 144 mA·h/g and capacity retention of 94% after 50 cycles at C/20.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体离子学
·
电池技术
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Yilian Song,Haoran Li,Kang Dong,Youjun Xing,Minghui Zhang,Mingzhu Yang,Xiang Huang,Wei Liu,Yongcheng Jin
The pursuit of high-voltage nickel-based layered terminal oxide materials (NCM) has gained significant research momentum owing to their compelling combination of cost-effectiveness and high energy density. However, critical challenges persist in mitigating parasitic interfacial reactions, electrolyte oxidative decomposition, and structural degradation mechanisms under elevated operating voltages (>4.3 V vs. Li/Li + ). Here, we propose a synergistic dual-additive electrolyte strategy by adding tris(pentafluorophenyl)borane (TPFPB) and lithium difluoro(oxalato)borate (LiDFOB) to a conventional carbonate-based electrolyte, aiming to enhance the performance of high-voltage LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622). Theoretical and experimental analyses show that LiDFOB reduces harmful side products (e.g., HF, PF 5 ) by inhibiting LiPF 6 decomposition, while TPFPB's rigid structure promotes a uniform and dense cathode electrolyte interface (CEI) film on the cathode. The two additives work synergistically to enabling the Li/NCM622 half-cells to maintain a capacity retention of up to 76.8 % after 500 cycles at 1C under 4.5 V high voltage, while the cell prepared with an electrolyte without any additives only retained 7.6 % capacity after cycling. The synergistic strategy employing TPFPB and LiDFOB to enhance the high-voltage cycling stability provides a promising practical feasibility of high-voltage batteries for industrial application.
研究领域:
电化学
·
能源材料
·
锂离子电池
·
表面与界面工程
·
电解液化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Yuqing Dai,Jiaxu Tan,Zihan Hou,Bianzheng You,Gui Luo,Duo Deng,Wenjie Peng,Zhixing Wang,Huajun Guo,Xinhai Li,Guochun Yan,Hui Duan,Ying Wang,Feixiang Wu,Jiexi Wang
The matching of poly(ethylene oxide) (PEO)-based electrolytes with ultrahigh-nickel cathode materials is crucial for designing new-generation high-energy-density solid-state lithium metal batteries (SLMBs), but it is limited by serious interfacial side reactions between PEO and ultrahigh-nickel materials. Here, a high-concentration electrolyte (HCE) interface with a customized Li+ solvation sheath is constructed between the cathode and the electrolyte. It induces the formation of an anion-regulated robust cathode/electrolyte interface (CEI), reduces the unstable free-state solvent, and finally achieves the compatibility of PEO-based electrolytes with ultrahigh-nickel cathode materials. Meanwhile, the corrosion of the Al current collector caused by lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) ions is prevented by lithium difluoro(oxalato)borate (LiDFOB) ions. The synergistic effect of the double lithium salt is achieved by a well-tailored ratio of TFSI– and DFOB– in the first solvation sheath of Li+. Compared with reported PEO-based SLMBs matched with ultrahigh-nickel (Ni ≥ 90%) cathodes, the SLMB in this work delivers a high discharge specific capacity of 216.4 mAh g–1 (0.1C) even at room temperature. This work points out a direction to optimize the cathode/electrolyte interface.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Fengwei Bai,Yan Li,Ziyu Chen,Yongchao Zhou,Chengzong Li,Tao Li
High-voltage lithium (Li)-metal batteries with cell-level energy density over 350 Wh kg −1 are promising energy storage systems . However, the aggressive interphase chemistries associated with highly reactive Li-metal anode and high-voltage cathodes impede their practical applications. Herein, we demonstrate the targeted stabilization of solid electrolyte interphase (SEI) and cathode electrolyte interphase (CEI) in high-voltage Li-metal batteries by asymmetrically sustained-releasing different additives. An asymmetric sustained-release film loaded with lithium bis-(oxalate)borate (LiBOB) and LiNO 3 on each side is investigated as a proof-of-concept. The sustained-releasing of LiBOB and LiNO 3 can maintain a localized concentration at the high-voltage cathode and Li-metal anode fronts respectively, thus forming a stable B-containing CEI and N-containing SEI. As such, issues like dendrites growth, parasitic side reactions and transition metals dissolution under high-voltage are addressed simultaneously. Based on this strategy, the 30 μm Li|LiNi 0.5 Co 0.2 Mn 0.3 O 2 (4.1 mAh cm −2 ) batteries deliver a capacity retention of 80% after 173 cycles under a cut-off voltage of 4.5 V.
研究领域:
储能系统
·
电池技术
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yongquan Zhang,Jingrun Hu,Jingshun Wang,Sen Wang,Cheng Wan,Yue Zhang,Tiandong Zhang,Changhai Zhang,Qingguo Chi
Solid-state electrolytes face significant challenges in concurrently optimizing mechanical strength and ionic conductivity. To address this issue, a two-step synthesis strategy was employed to construct a hierarchical mesh-interpenetrating network composite electrolyte. The electrolyte contained self-crosslinking networks formed by the reaction of epoxy resin polyethylene glycol diglycidyl ether (PEGDE) catalyzed by lithium difluoro(oxalato)borate (LiDFOB), embedded within a rigid layered skeleton induced by 365 nm ultraviolet light in the liquid crystal compound 1,4-bis[4-(6-acryloyloxyhexanoyloxy)benzoyloxy]-2-methylbenzene (C6M). The independent formation and spatial interpenetration of the two network systems resulted in significant synergistic effects. The resulting PEGDE-LC composite electrolyte (designated as PLE) exhibited a room-temperature ionic conductivity of 2.61 × 10 −4 S·cm −1 , an electrochemical stability window of 4.79 V vs. Li + /Li, and a tensile strength of 4.7 MPa for the optimized PLE-3 formulation. The LFP/Li battery delivered an initial discharge capacity of 153.8 mAh·g −1 at room temperature under a 1C rate, with a capacity retention of 89.6 % (137.9 mAh·g -1) after 300 cycles. This interpenetrating network structure, based on material composite synergy, provides a novel material design strategy to overcome the trade-off between mechanical and electrochemical properties in solid-state electrolytes.
研究领域:
材料科学
·
储能技术
·
电化学
·
高分子化学
·
锂离子电池
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9307-9318
·
IF 12.732
Tianle Zheng,Jianwei Xiong,Bingying Zhu,Xiaotang Shi,Ya-Jun Cheng,Hongbin Zhao,Yonggao Xia
Lithium secondary batteries (LSBs) have witnessed explosive growth in the last decade. A wide operating temperature window is crucial for practical applications. A new concept is developed to expand the temperature window between −20 °C and 150 °C, where a competitive decomposition process between the electrolyte and solvent is manipulated with adiponitrile (ADN) over a wide temperature range. The decomposition of ethylene carbonate (EC) solvent and anions of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and lithium oxalyldifluoroborate (LiODFB) is regulated with ADN via a temperature-dependent lithium solvation mechanism. As a result, a SEI layer with a rich inorganic component is formed at elevated temperatures, leading to improved performance in lithium titanate (LTO)/Li, lithium iron phosphate (LFP)/Li, and LiNi0.5Co0.2Mn0.3O2 (NCM523)/Li batteries over a wide temperature range. It enables a coulombic efficiency (CE) of 97.39% at 100 °C and more than 100 hours of cycling of Li/Li batteries at 150 °C, as well as stable cycling of LFP/Li batteries in the temperature range between 120 °C and −20 °C. Stable cycling performance is demonstrated with the LTO/Li batteries over a wider temperature range from −40 °C to 150 °C. High-temperature electrochemical stability is exhibited at 5C, with a capacity retention ratio of 87.94% at 120 °C and 99.93% at 100 °C after 1000 cycles.
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 38
·2503713
·
IF 19
Caiyan Shen,Dichang Guan,Wenchao Liu,Yanbing Cao,Zhongdong Peng,Yu Ren,Litao Kang,Jinhao Meng,Zhichen Xue,Ke Du
The development of fluorine-free electrolytes offers a promising route for more environmentally sustainable lithium-ion batteries (LIBs). However, the low solubility of fluorine-free lithium salts in conventional carbonate solvents limits this progress. Additionally, while strongly coordinating solvents enhance salt dissolution, their use can lead to co-intercalation in graphite, complicating electrolyte design. Herein, lithium bis(oxalate)borate (LiBOB) is chosen as lithium salt, and a synergistic electrolyte design strategy is employed, combining a strongly coordinating solvent (tris(2-methylpropyl) phosphine oxide, TMP) and weakly coordinating solvent (dimethyl carbonate, DMC). This approach enables the use of fluorine-free lithium salts while ensuring compatibility with graphite by modulating the primary coordination shell. Furthermore, this solvation structure enables the formation of an inorganic-dominated cathode electrolyte interphase (CEI) on the LiMn 2 O 4 (LMO) and a solid electrolyte interphase (SEI) on the graphite, improving lithium-ion conductivity and overall electrochemical performance. Additionally, compared to lithium hexafluorophosphate (LiPF 6 ), fluorine-free lithium salt minimized the formation of HF by-products, suppressing transition metals (TMs) dissolution. As a result, 1 Ah LMO||graphite pouch cell with fluorine-free electrolyte retains 92.8% of its capacity after 200 cycles, demonstrating excellent cycling stability and delivering high-rate capacity of 0.8486 Ah at 2 C, compared to 84.8% retention and 0.652 Ah with the conventional electrolyte.
研究领域:
电化学
·
能源材料
·
电池技术
·
可持续化学
·
材料科学
✓ 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）