ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoli Peng,Hongmei Shen,Kai Su,Wenjie Wang,Shijie Weng,Chenxia Tang,Zhiyu Xue,Yong Xiang
Ternary nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) is recognized as a cathode material with a promising future, attributed to its high energy density. However, the pulverization of cathode particles, structural collapse, and electrolyte decomposition are closely associated with the fragile cathode–electrolyte interphases (CEI), which seriously affect the electrochemical performances of ternary high-nickel materials. In this paper, fluorine- and nitrogen-containing methyl-2-nitro-4-(trifluoromethyl)benzoate (MNTB) was selected, which was synergistically regulated with fluoroethylene carbonate (FEC) to generate a robust CEI film. The preferential decomposition of MNTB/FEC results in the formation of an inorganic-rich (Li3N, LiF, and Li2O) CEI film with uniformly dense and stable characteristics, which is conducive to the migration of Li+ and the stability of the NCM811 structure and enhances the cycling stability of the battery system. Simultaneously, MNTB effectively suppresses the adverse reaction associated with increased polarization caused by higher interface impedance due to conventional single FEC additives, further improving the rate capability of the battery. Moreover, MNTB/FEC can effectively eliminate HF, preventing its corrosion on the NCM811 cathode. Under the synergistic effect of MNTB/FEC, after 300 discharge cycles at a high cutoff voltage of 4.3 V and a current density of 1 C (2 mA cm–2), the discharge capacity of the NCM811||Li battery was 150.12 mA h g–1 with a capacity retention of 81.10%, while it was only 32.8% for the standard electrolyte (STD). The discharged capacity of the MNTB/FEC-containing battery was about 115.43 mA h g–1 at the high rate of 7 C, which was considerably higher than that of the STD (93.34 mA h g–1). In this study, the designed MNTB as a novel solvent synergistically regulated with FEC will contribute to the enhanced stability of NCM811 materials at high cutoff voltages and at the same time provide an effective modified strategy to enhance the stability of commercial electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fangfang Shang,Hengdao Quan,Xiaoxun Ma
In this study, 3-trifluoromethylpyrazole (TMPZ) was developed as a multifunctional electrolyte additive to enhance wettability between separator and electrolyte, CEI formation and remove HF to improve the performance of Li/NCM622 batteries by experiment and theoretical calculation. After 200 cycles at 30 °C, the discharge capacity retention of batteries at 1 C with 0.5 wt% TMPZ additive is remarkably enhanced from 68.3 % to 83.2 %. The enhanced electrochemical performance of the batteries by adding TMPZ additive is evaluated by the spectroscopic characterization and theoretical calculation. It is demonstrated that TMPZ can generate uniform and dense CEI film via ring-opening electrochemical polymerization of TMPZ on the NCM622 electrode surface. The CEI film helps to suppress the breakdown of LiPF 6 electrolyte and the leaching of transition metals, effectively avoiding harmful side reactions between the NCM622 electrode and the electrolyte. Furthermore, introducing TMPZ can enhance the wettability between separator and electrolyte, therefore providing more channels of Li + to accelerate reaction kinetics of 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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jinping Mu,Aijia Wei,Xiaohui Li,Rui He,Lijing Sun,Peizhao Liu,Xue Bai,Lihui Zhang,Xi Zhang,Zhenfa Liu,Jing Gao
Tris (trimethylsilyl) phosphate (TMSP) and tris(2,2,2-trifluoroethyl) phosphate (TTFP) was added to carbonate solvent-based electrolytes as dual-additives to enhance the performance of LiNi 0·5 Mn 1·5 O 4 (LNMO). The X-ray photoelectron spectroscopy results revealed that both TMSP with high oxidation ability and TTFP with high oxidation resistance participated in the formation of cathode–electrolyte interphase (CEI) films. Electrochemical impedance spectroscopy confirmed that the constructed CEI films had excellent electronic insulation and ionic conductivity , reducing the interfacial impedance of the LNMO electrode, and improving the electrochemical performance of LNMO/Li half-cells and LNMO/Li 4 Ti 5 O 12 full-cells. As measured by the nuclear magnetic resonance , the incorporation of TMSP and TTFP significantly reduced the HF content in the electrolytes. Therefore, both LNMO/Li half-cells (500 cycles with 95.7% capacity retention) and LNMO/Li 4 Ti 5 O 12 full-cells (200 cycles with 79.9% capacity retention) displayed higher cycling stabilities at 5 C owing to the synergistic effect of TMSP and TTFP. In comparison, capacity retentions of ∼76.5% after 500 cycles and ∼37.2% after 200 cycles were respectively achieved for the LNMO/Li half-cells and LNMO/Li 4 Ti 5 O 12 full-cells with the standard electrolyte at 5 C. This study provides strong evidence that additive combinations can improve the electrochemical performance of high-energy and high-voltage cathode materials .
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
·
2025
·
IF 9.8
Jian Lv,Zhuyu Wang,Yihuan Zhou,Weihao Yu,Qinggong Jia
Due to long-term operation under high voltage, the cathode of lithium metal battery undergoes parasitic reactions with the electrolyte, resulting in non-conductive polymers that severely affect the battery's electrochemical performance and kinetics. In addition, the safety performance of the battery is seriously compromised by severe lithium deposition on the lithium metal side. The use of electrolyte additives is one of the most cost-effective strategies for improvement. A low-cost boron-based additive bis(pinacolato)diboron (BDB) has been proposed in this work which has relatively high activity during battery charging and discharging. A protective cathode electrolyte interface (CEI) film was formed by BDB on the surface of NCM811 in advance to resist HF and solvent erosion. Furthermore, the solid electrolyte interface (SEI) film that BDB participates in on the lithium metal surface exhibits high ion conductivity and effectively inhibits the formation of lithium dendrites, thereby ensuring the safe operation of lithium metal batteries. The lithium metal battery utilizing BDB not only exhibits optimal electrochemical performance with a high cut-off voltage of 4.6 V, but also demonstrates potential for further development in the realms of rapid charging and discharging.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Jian Lv,Zhuyu Wang,Yihuan Zhou,Yiwen Wang,Danni Shen,Qinggong Jia
Cathodes containing Ni, Co, and Mn frequently undergo side reactions with the electrolyte during the long cycles of the battery in traditional electrolytes under high voltage. In this work, an efficient composite cathode–electrolyte interface (CEI) film is constructed in situ with two additives; that is, 2-[(trimethylsilyl)ethynyl]thiophene (TET) is oxidized and polymerized in advance to form a film attached to the cathode surface, while oxidation products of bis(pinacolato)diboron (BDB) as a high ion conductor are doped into the TET polymer film. The combination of the oxidation products of the two additives not only effectively isolates solvent molecules and hydrofluoric acid erosion, preventing the occurrence of side reactions, but also does not affect the transfer of lithium ions. The crystal structure stability of LiNi0.8Mn0.1Co0.1O2 (NCM811) could be effectively regulated by the composite CEI film through in situ X-ray diffraction characterization during the charge–discharge process. The dynamic performance of the battery has also been improved by comparing the discrepancy of pseudocapacitance across the battery with different electrolytes. Furthermore, the solid–electrolyte interface film formed by TET and BDB could provide effective protection for lithium metal from electrolyte corrosion and inhibit the formation of lithium dendrites. Therefore, the battery capacity retention rate could reach 91.12% after 300 cycles. In addition, the battery with a high-load cathode (2.52 mAh cm–2) has a capacity retention rate of up to 90.19% after 50 cycles, which may make the future application of pouch batteries more feasible.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Cheng Chen,Jiali Guo,Chunlei Wu,Xianjian Duan,Lingzhi Zhang
Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) is considered the most prominent cathode material to establish a practical high energy density of lithium-ion batteries (LIBs) for future electric vehicles. The energy density of LIBs is greatly determined by the capacity of electrode materials and the operating voltage of the cells. To further improve the cycle lifespan of NCM811 batteries to meet the requirement of driving range for the electric vehicle market, it is vital to design a novel electrolyte additive that can enhance the stability of the cathode/electrolyte interface at a wide range of voltage. Herein, a novel borate functionalized disiloxane compound, 1,1,1,3,3-pentamethyl-3-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)propyl) disiloxane (PMBPDS), is synthesized as cathode electrolyte interphase (CEI) film-forming additive to improve the cycling performance of NCM811 batteries. Systematic studies reveal that PMBPDS can construct a stable CEI film on the NCM811 surface and efficiently scavenge hydrofluoric acid (HF). The PMBPDS-derived CEI prevents the dissolution of transmission metals in the NCM811 cathode and enhances the capacity retention of NCM811/graphite cells from 68.3 to 70.6% after 200 cycles at 1 C in the voltage window of 3–4.5 V. This work provides more understanding on designing the molecular structure of additive compounds for improving the electrochemical performance of LIBs.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuan Wang,Shuo Huang,Benben Wei,Min Liu,Bo Yang,Ruoqing Liu,Hongyun Jin
All-solid-state batteries with oxide electrolytes and high-nickel layered oxide cathodes (LiNixCoyMnzO2 and LiNixCoyAlzO2, x + y + z = 1, x ≥ 60%) have received widespread attention owing to their high energy density and high safety. However, they generally suffer from interfacial structural instability when coupled with solid-state electrolytes, which strongly diminishes the longevity of the battery. In this work, we propose adding a sacrificial additive C60 to the catholyte buffer layer between Li1.4Al0.4Ti1.6(PO4)3 (LATP) and LiNi0.8Co0.1Mn0.1O2 (NCM811) to enhance the electrochemical stability under high-voltage operating conditions. A uniform and robust cathode–electrolyte interphase (CEI) film enriched with LixPOyFz, LiPxFy, and C60Fn is spontaneously formed on the surface of the cathode particles. In addition, the NCM811/Li solid-state battery delivers a discharge capacity of 150.3 mAh g–1 with a retention of 85% after 200 charge–discharge cycles at 0.5 C. This study offers a practical approach toward realizing LATP-based all-solid-state high-voltage batteries characterized by exceptional cycling stability.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lucheng Li,Meiling Liu,Peng Yang,Wenfeng Yuan,Jun Chen
Broadening the charging and discharging voltage window of high nickel cathode material NCM811 is the most expected method to improve the high specific energy density of batteries currently, yet the cathode-electrolyte interface (CEI) formed by the oxidized and decomposed products of carbonate-based electrolyte under high voltage are always so unsatisfied. Therefore, a voltage-stabilizer, TPFPB (Tris(pentafluoro)phenylborane), added into baseline electrolyte (1 M LiPF 6 in EC:EMC:DMC=1:1:1 vol%) to promote the electrochemical performance of the battery at 4.5 V. The results interpret that the TPFPB-contained NCM811-Li half-cells exhibit high specific capacity (167.10 mAh/g), excellent capacity retention rate (CRR) (75.37 %), and high rate performance (173.3 mAh/g at 5C) during 4.5 V. Meanwhile, through the analysis of the physical characterization techniques. the B- and F-rich interfacial layer, named as CEI film, existing at the interface between the cathode and the electrolyte, produced under 4.5 V, is superior, resulting in impeding the structural collapse of the cathode material and the continued dissolution of transition metal ions (TM n + ) from the cathode material, as well as, ameliorate the electrochemical polarization of the battery, ultimately, it can stabilize the electrochemical performance of the battery under high voltage. Therein, the present work elucidate a new and substantial approach to enhance the high-voltage performances of rich-Ni cathode materials.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qiang Wang,Qian Wang,Xinming Fan,Chaofan Tang,Lu Zhou,Shan Liu,Hui Tang,Runjin Liu,Linka Zhu,Lei Zhang,Qinghua Tian,Xueyi Guo
In recent years, there has been notable advancement in the development of high-performance materials for sodium-ion batteries, particularly in layered oxide cathodes. However, research on enhancing the interface between electrolytes and cathodes remains nascent. One promising approach involves the addition of electrolyte additives, recognized for their cost-effectiveness and efficiency in bolstering the electrode/electrolyte interface to enhance material stability during high-voltage cycling. In this work, we investigate the use of glutaric anhydride (GA) as an electrolyte additive to improve the cycling stability of NaNi 1/3 F 1/3 M 1/3 O 2 /Na (NFM/Na) high-voltage sodium-metal batteries. Batteries using GA-containing electrolytes demonstrate impressive capacity retention: 80.51 % after 200 cycles at 4.0 V and 76.01 % after 150 cycles at 4.1 V. The research delves into the mechanistic insights behind GA’s effectiveness in enhancing cyclic stability. Theoretical calculations reveal that GA plays a crucial role in modifying the structure of the first solvation shells, promoting the formation of an elastic cathode-electrolyte interface (CEI) film enriched with O C O groups. This uniform and stable CEI film effectively preserves the material’s crystal structure and mitigates the dissolution of transition metals, thereby prolonging battery lifespan under demanding extremely cycling conditions.
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
ENERGY & FUELS
·
2024
·
IF 5.2
Jian Lv,Yiwen Wang,Zhuyu Wang,Danni Shen,Qinggong Jia
Ternary high-nickel oxide exhibits a relatively high working voltage compared with traditional lithium battery cathodes (LiFePO4, etc.). Consequently, it has been widely studied in recent years and is at the forefront of research on positive electrodes for power batteries. To achieve higher reversible capacity, it is often necessary to increase the battery operating voltage. However, there are many drawbacks to this method, such as surface cracking of the working electrode and serious side reactions with the electrolyte. The novel dual-additive combination in this work has the potential to significantly address the aforementioned issues. A composite polymer cathode–electrolyte interface (CEI) film is formed on the surface of the cathode due to two aromatic compound additives preoxidation. The stable CEI film not only improves the stability of the electrode but also suppresses solvent and hydrofluoric acid (HF) to effectively inhibit the side reaction on the cathode surface. Furthermore, these two additives can be readily reduced at the anode to form a solid electrolyte interface (SEI) membrane containing rich LiN&LiF, which effectively suppresses the formation of lithium dendrites. The battery capacity retention could be up to nearly 83% on the dual-additive electrolyte compared to the baseline electrolyte after 300 cycles. This work may provide more possibilities for future research on high-voltage lithium batteries.
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
Journal of Energy Storage
·
2025
·
IF 9.8
Hao Yu,Guoqing Liu,Hao Jia,Tao Zhu,Xinxin Dong,Wei Liu,Xiaoyu Gu,Shuheng Wang,Sheng Zhang
Polyethylene oxide (PEO) organic solid electrolyte is regarded as one of the important research directions of next-generation battery technology due to its good electrode interface compatibility, mechanical flexibility, and economic processability. However, the low ionic conductivity, limited electrochemical stability, and flammability of PEO have restricted its large-scale application. This work reports the synthesis of multifunctional flame-retardant microspheres (HCCP-THEIC, HT) using hexachlorocyclotriphosphazene (HCCP) and 1,3,5-tris(2-hydroxyethyl) isocyanurate (THEIC), and subsequently incorporation into PEO. It has been demonstrated that the crystallinity of PEO is reduced under the synergistic effect of physical hindrance from HT and the weak intermolecular hydrogen-bond interactions between HT and PEO. This promotes the dissociation of lithium salts, leading to an increase in the mobility and concentration of free Li + , thereby expanding the electrochemical window to 4.7 V. More importantly, HT stabilizes the electrode-electrolyte interface, promotes the formation of stabilized constituents in both the SEI (solid electrolyte interphase) and CEI (cathode electrolyte interphase) layers, and effectively suppresses lithium dendrites growth. The LiNi₀.₈Mn₀.₁Co₀.₁O₂ (NCM811)//Li cell retains 77.4 % of its capacity after 100 cycles at 4.3 V and 0.5C. Additionally, HT enhances fire safety through free radical scavenging and condensed-phase carbonization, reducing the heat release of pouch batteries by approximately 10 %. This simple and scalable HT synthesis offers a promising approach for producing safe, high-performance, and stable all-solid-state lithium metal batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
高分子化学
·
界面化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·090554
·
IF 4.316
Donghai Huang,Zhiqiang Ge,Changfu Yuan,Ao Mei,Zhiyong Fu,Zhiping Le
Bis(neopentyl glycolato)diboron (BNGDB) is used as a electrolyte additive to improve the stability of commercialized lithium ion batteries operating at a high charging-cutoff voltage. Adding of BNGDB lowers the oxidation potential of the electrolyte, which will lead to the formation of a uniform, stable, and low resistance cathode solid electrolyte interphase (CEI) on the cathode surface. This CEI film can suppress the loss of electrolyte by preventing further reaction between electrolyte and cathode material (LiNi0.6Co0.2Mn0.2O2), which improves cyclic stability and discharge capability of LiNi0.6Co0.2Mn0.2O2/graphite pouch cells. With 0.5 wt% BNGDB addition, the pouch cell demonstrate a discharge capacity retention of 83.2% after 200 cycles in base electrolyte. This work brings new insight into the role of additives in electrolytes and can guide the design of more versatile electrolytes for commercialized lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）