ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yue Lei,Xin Xu,Junying Yin,Sen Jiang,Kang Xi,Lai Wei,Yunfang Gao
Li-metal batteries (LMBs), especially in combination with high-energy-density Ni-rich materials, exhibit great potential for next-generation rechargeable Li batteries. Nevertheless, poor cathode–/anode–electrolyte interfaces (CEI/SEI) and hydrofluoric acid (HF) attack pose a threat to the electrochemical and safety performances of LMBs due to aggressive chemical and electrochemical reactivities of high-Ni materials, metallic Li, and carbonate-based electrolytes with the LiPF6 salt. Herein, the carbonate electrolyte based on LiPF6 is formulated by a multifunctional electrolyte additive pentafluorophenyl trifluoroacetate (PFTF) to adapt the Li/LiNi0.8Co0.1Mn0.1O2 (NCM811) battery. It is theoretically illustrated and experimentally revealed that HF elimination and the LiF-rich CEI/SEI films are successfully achieved via the chemical and electrochemical reactions of the PFTF additive. Significantly, the LiF-rich SEI film with high electrochemical kinetics facilitates Li homogeneous deposition and prevents dendritic Li from forming and growing. Benefiting from the collaborative protection of PFTF on the interfacial modification and HF capture, the capacity ratio of the Li/NCM811 battery is boosted by 22.4%, and the cycling stability of the symmetrical Li cell is expanded over 500 h. This provided strategy is conducive to the achievement of high-performance LMBs with Ni-rich materials by optimizing the electrolyte formula.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yuantao Yan,Xiaoli Zhao,Huanglin Dou,Jingjiang Wei,Zhihua Sun,Yu-Shi He,Qiang Dong,Haisong Xu,Xiaowei Yang
Silicon-based materials are the desirable anodes for next-generation lithium-ion batteries; however, the large volume change of Si during the charging/discharging process causes electrode fracture and an unstable solid–electrolyte interphase (SEI) layer, which severely impair their stability and Coulombic efficiency. Herein, a bundle of silicon nanoparticles is encapsulated in robust micrometer-sized MXene frameworks, in which the MXene nanosheets are precrumpled by capillary compression force to effectively buffer the stress induced by the volume change, and the abundant covalent bonds (Ti–O–Ti) between adjacent nanosheets formed through a facile thermal self-cross-linking reaction further guarantee the robustness of the MXene architecture. Both factors stabilize the electrode structure. Moreover, the abundant fluorine terminations on MXene nanosheets contribute to an in situ formation of a highly compact, durable, and mechanically robust LiF-rich SEI layer outside the frameworks upon cycling, which not only shuts down the parasitic reaction between Si and an organic electrolyte but also enhances the structural stability of MXene frameworks. Benefiting from these merits, the as-prepared anodes deliver a high specific capacity of 1797 mA h g–1 at 0.2 A g–1 and a high capacity retention of 86.7% after 500 cycles at 2 A g–1 with an average Coulombic efficiency of 99.6%. Significantly, this work paves the way for other high-capacity electrode materials with a strong volume effect.
研究领域:
材料科学
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电化学
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纳米能源
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锂离子电池
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功能材料
·
界面化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Kaixin Zhao,Qi Jin,Liyuan Zhang,Lu Li,Lili Wu,Xitian Zhang
Lithium–Sulfur (Li‒S) battery is regarded as the most promising next-generation energy storage system due to their low cost and high theoretical energy density. However, the formation of dendritic morphology of Li makes the side reactions between Li metal anode and lithium polysulfides (LiPSs) more serious, leading to the depletion active materials and short lifespan of batteries , which becomes a bottle neck of their practical application. Herein, a LiF-rich Li deposition regulating layer (LDRL) is developed to protect the Li anode in Li‒S battery. The LiF-rich LDRL can effectively regulate the deposition morphology of Li, thus decreases the corrosion of the LiPSs to the Li anode. A symmetrical cell with LDRL can stably cycle for more than 700 h at a current density of 1 mA cm −2 . The Li‒S batteries using Li anodes with a LDRL presents better cycling stability (760 mAh g −1 after 100 cycles at 0.1 C) compared with the batteries using the bare Li anodes. This work provides a new idea for protecting Li anode in Li‒S battery.
研究领域:
储能系统
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电池技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yong Wu,Honglei Liu,Deli Li,Ranlin Dong,Mengfan Bu,Bei Liu,Xiaoming Fan,Weixin Zhang
Silicon (Si) is emerging as a highly promising anode material candidate for high energy-density lithium-ion batteries (LIBs). However, its significant volume expansion during cell cycling poses a substantial challenge. Herein, fluorinated carbon derived from a fluorine-rich polymer is employed as a functional layer to engineer the solid electrolyte interface (SEI) of Si based anode material, featuring LiF-rich components in the SEI film. The strong initial Coulombic efficiency (ICE)-semi-ionic F/C linear correlation in Si@C/F nanoparticles demonstrates the essential function of semi-ionic fluorine in high-efficiency Si anodes. Semi-ionic fluorine promotes preferential LiF nucleation during SEI formation, which simultaneously suppresses lithium-consuming side reactions to enhance ICE and stabilizes the electrode interface. The homogeneous LiF distribution creates low-barrier Li + diffusion channels, markedly boosting electrode kinetics for enhanced high-rate capability. As a result, the Si@C/F composite exhibits outstanding electrochemical performance, with an ICE value as high as 88.8 %. The Si@C/F composite also demonstrates excellent long-cycling stability and high-rate capability, maintaining a reversible capacity of 971.8 mAh g −1 even under 1 A g −1 for 500 cycles. This work reveals the regulation of C F bonds in the carbon layer to construct robust SEI layer in the Si/C composites, offering a strategy for advanced Si-based anode materials with both high ICE and stable cycling performance.
研究领域:
储能
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材料科学
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电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 40
·2202981
·
IF 15.153
Minrong Guan,Yongxin Huang,Qianqian Meng,Botao Zhang,Nuo Chen,Li Li,Feng Wu,Renjie Chen
The next generation of high-energy-density storage devices is expected to be rechargeable lithium metal batteries. However, unstable metal-electrolyte interfaces, dendrite growth, and volume expansion will compromise lithium metal batteries (LMB) safety and life. A simple drop-casting method is used to create a double-layer functional interface composed of inorganic mesoporous TiO 2 and F-rich organics PFDMA. For high-quality lithium deposition, TiO 2 can provide uniform mechanical pressure, abundant mesoporous channels, and increased ionic conductivity, while PFDMA provides enough F to form LiF in the first cycle and improves Li-electrolyte compatibility. Experiments and simulations are combined to investigate the optimized mechanism of the LiF-rich solid electrolyte interface (SEI). The high binding energy of organic matter and Li demonstrates that Li + preferentially binds with the F atom in organic matter. As a result, the tightly bound double-layer structure can inhibit lithium dendrite growth and slow electrolyte decomposition. Consequently, the symmetric Li||Li cell has a high stability performance of over 800 h. The assembled LiFePO 4 ||Li cell can sustain 300 cycles at a 1 C rate and has a reversible capacity of 136.7 mAh g −1 .
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
PubMed
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-11
·
IF 12.121
Liu Wei,Li Jinxing,Li Wenting,Xu Hanying,Zhang Chao,Qiu Xinping
The low Coulombic efficiency during cycling hinders the application of Cobalt-free lithium-rich materials in lithium-ion batteries. Here we demonstrated that the dissolution of iron, rather than traditionally acknowledged manganese, is mainly responsible for the low Coulombic efficiency of the iron-substituted cobalt-free lithium-rich material. Besides, we presented an approach to inhibit the dissolution of transition metal ions by using concentrated electrolytes. We found that the cathode electrolyte interphase (CEI) layer formed in the concentrated electrolyte is a uniform and robust LiF-rich CEI, which is a sharp contrast with the uneven and fragile organic-rich CEI formed in the dilute electrolyte. The LiF-rich CEI not only effectively inhibits the dissolution of TMs but also stabilizes the cathode structure. The Coulombic efficiency, cycling stability, rate performance, and safety of the Fe-substituted cobalt-free lithium-rich cathode material in the concentrated electrolyte have been improved tremendously.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yuan Gao,Jing Gao,Zhibin Zhang,Yue Wu,Xiaolin Sun,Fuhua Zhao,Yuan Zhang,Depeng Song,Wenyan Si,Qing Zhao,Xun Yuan,Jianfei Wu
Sulfide solid-state electrolytes have garnered considerable attention owing to their notable ionic conductivity and mechanical properties. However, achieving an electrolyte characterized by both high ionic conductivity and a stable interface between the electrode and electrolyte remains challenging, impeding its widespread application. In this work, we present a novel sulfide solid-state electrolyte, Li3.04P0.96Zn0.04S3.92F0.08, prepared through a solid-phase reaction, and explore its usage in all-solid-state lithium sulfur batteries (ASSLSBs). The findings reveal that the Zn, F co-doped solid-state electrolyte exhibits an ionic conductivity of 1.23 × 10–3 S cm–1 and a low activation energy (Ea) of 9.8 kJ mol–1 at room temperature, illustrating the aliovalent co-doping’s facilitation of Li-ion migration. Furthermore, benefiting from the formation of a LiF-rich interfacial layer between the electrolyte and the Li metal anode, the Li/Li3.04P0.96Zn0.04S3.92F0.08/Li symmetrical cell exhibits critical current densities (CCDs) of up to 1 mA cm–2 and maintains excellent cycling stability. Finally, the assembled ASSLSBs exhibit an initial discharge capacity of 1295.7 mAh g–1 at a rate of 0.05 C and at room temperature. The cell maintains a capacity retention of 70.5% for more than 600 cycles at a high rate of 2 C, representing a substantial improvement compared to the cell with Li3PS4. This work provides a new idea for the design of solid-state electrolytes and ASSLSBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Jun Pan,Huili Peng,Yehao Yan,Yuzhou Bai,Jian Yang,Nana Wang,Shixue Dou,Fuqiang Huang
Polymer solid-state batteries (SSBs) possess the advantages of good interfacial contact, but their application faces low ionic conductivity. Here, three-dimensional (3D) porous composite polymer electrolytes with propylene carbonate plasticizer (3D-PPLLP-CPEs) fabricated effectively, displaying high ionic conductivity even at room temperature. Electrochemical in-situ polymerization of 3D-PPLLP-CPEs occurs during the first discharge process, avoiding safety issues caused by the liquid plasticizer without sacrificing the ionic conductivity of the electrolyte. Besides, the controllable in-situ generated LiF-enriched interface can avoid the Li dendrite growth. To further promote the practical value of SSBs, micro-sized Si@Li 3 PO 4 @C with high initial Coulombic efficiency was adopted to replace lithium foil. The LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM111)//Micro Si@Li 3 PO 4 @C full cell has achieved capacity of 129.1 mAh g −1 at a current density of 0.2 C, with capacity retention of 98.5% after 100 cycles, which is the best performance based on the Si anode in SSBs. Even at the high current density of 2.0 A g −1 , the capacity remains 92.5 mAh g −1 . This design of CPEs and electrodes has paved a new way to construct practical SSBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）