JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Qi Jin,Kaixin Zhao,Xitian Zhang
The lithium–sulfur (Li–S) battery is an appealing choice for the next-generation high-energy-density energy storage systems . However, side reactions between lithium polysulfides (LiPSs) and Li metal anode cause the growth of Li dendrites, loss of active materials, and safety issues, which severely hinders the practical application of Li–S batteries. Constructing a protection layer on the surface of Li anode is an effective strategy to shield LiPSs and regulate lithium uniform deposition in Li–S batteries. Herein, we design and fabricate a lithiated Nafion protective layer to alleviate the side reactions between LiPSs and the Li anode and guide uniform deposition of Li, in which, their mechanism is investigated. The optimal protective layer effectively protects the Li anode from the detrimental side reactions, which boosts the stability of the Li anode. Li–Li and Li-stainless steel cells with 4 M [S] Li 2 S 8 electrolyte can last for more than 400 cycles and 100 cycles at current density of 1 mA cm −2 . A Li–S full cell also exhibits a high reversible capacity of 791.5 mA h g −1 after 250 cycles at 0.5 C. This work reveals the vital role of the artificial protective layer in enhancing the stability of the Li anode in Li–S batteries.
研究领域:
电化学
·
能源材料
·
电化学储能
·
电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xi Wang,Yong Wang,Yiyu Wu,Yunmiao Fan,Yang Tian
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid garnet-type electrolyte has been widely reported due to its outstanding safety and electrochemical stability. However, the inherent rigidity and brittleness of LLZTO lead to poor contact with anode/cathode and the operation failure of full cells. Herein, the dual-interlayers are constructed as the fast interfacial ion-migration channel by using Ti 3 C 2 T x (MXene, T x is –O, –OH, –F) with trace ionic liquid (IL), which promote the intimate contact between LLZTO and anode/cathode and suppress Li-dendrites growth. Notably, IL can wet the cathode to promote intimate interface contact and be decomposed into some inorganic compounds (such as Li 3 N, LiF, and Li 2 S x ), resulting in reduced interfacial resistance and fast Li-ion transportation. Consequently, in the prepared Li-symmetric cell, the interfacial resistance on the anode side plunges to 33.1 Ω cm −2 , and stably maintains over 1000 h without short circuit at 0.05 mA cm −2 . The full cell of Li|LiFePO 4 delivers a high initial capacity of 158.52 mA h g −1 and outstanding retention of 90.18% after 100 cycles at 60 °C and 0.2 C. Our work provides an efficient strategy to design dual-interlayers between LLZTO and anode/cathode for the interfacial modification to enhance the performance of solid garnet batteries.
研究领域:
材料科学
·
电化学
·
固态电池
·
界面工程
·
能源材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kuirong Deng,Suping Zhou,Zelin Xu,Min Xiao,Yuezhong Meng
High-performance polymer electrolytes with the capability to self-heal mechanical damage can effectively enhance reliability, safety and service life of the batteries. Herein, a novel polymer electrolyte (PBPE) with excellent self-healing capacity and high ionic conductivity was developed. PBPE with polymer networks cross-linked by highly reversible imine bonds was fabricated by the Schiff-base reaction between poly(ethylene glycol) diamine and benzene-1,3,5-tricarbaldehyde. PBPE can quickly repair the cut damage spontaneously within 1 h at room temperature and recover its mechanical strength and electrochemical properties. The healed PBPE exhibits almost the same ionic conductivities and mechanical properties as the original PBPE shows. PBPE possesses the highest ionic conductivity (4.79 × 10 −3 S cm −1 at 30 °C) among the self-healing polymer electrolytes. PBPE can promote the generation of LiF-rich SEI and effectively suppress dendrite growth on Li metal anodes. LiFePO 4 (LFP) cells assembled with PBPE exhibit excellent rate capability (discharge capacity of 118.2 mAh g −1 at 5 C rate) and good cycling performance (capacity retention of 97.8% over 125 cycles). More importantly, the healed PBPE can completely recover its properties from damage in LFP cells and enable the cells to possess cycle performance identical to original PBPE.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Jing Gao,Chunshui Sun,Lei Xu,Jian Chen,Chong Wang,Decai Guo,Hao Chen
Due to flexible property and light weight, the lithiated Nafion membrane swollen with PC (PC-Li-Nafion) has been employed as both solid-state electrolyte and separator to fabricate solid-state Li-S cells. The electrochemical measurements of PC-Li-Nafion membrane show that its Li-ion transference number is 0.928, ionic conductivity of 2.1 × 10 −4 S cm −1 can be achieved at 70 °C and its electrochemical window is 0 ∼ +4.1 V vs. Li + /Li. It is observed that the Li dendrites are suppressed by using PC-Li-Nafion membrane due to its single-ion conducting property. The amounts of Li-Nafion resin binder and conductive carbon in the cathode are optimized as 40% and 10% respectively to make a balance of ionic and electronic conductivities . A thin-layer Li-Nafion resin with a thickness of around 2 μm is fabricated between the cathode and PC-Li-Nafion membrane to improve the interfacial contact and further enhance the specific capacity of the cell. When measured at 70 °C, the Li-S cell delivers a reversible specific capacity of 1072.8 mAh g −1 (S) at 0.05 C and 895 mAh g −1 (S) at 1 C. The capacity retention at 1 C is 89% after 100 cycles. These results suggest that high-performance solid-state Li-S cells can be fabricated with the Li-Nafion polymer electrolyte .
研究领域:
电化学
·
能源材料
·
固态电池
·
聚合物电解质
·
锂离子电池
·
电极界面工程
·
储能技术
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2019
·
IF 2.886
Fan Deng,Yongmin Wu,Weiping Tang,Shufeng Song,Zhaoyin Wen,Masashi Kotobuki,Li Lu,Jianyao Yao,Ning Hu,Janina Molenda
The use of garnet-type conductors as electrolytes for safe lithium solid-state batteries is impeded by the lack of critical processing strategy to stabilize and densify the cubic lithium garnets. The synthesis and processing of dense cubic lithium garnets are typically depending on solid state reaction as a result of unintentional Al contamination from the alumina crucibles at temperatures up to 1230 °C. High Al concentration is also believed to induce the sluggish migration of lithium ions . Here, we demonstrate an ultrathin, conformal γ-Al 2 O 3 surface coating on garnet solids by a hybrid microemulsion solid-state method for accomplishing rational and controllable synthesis and processing of dense cubic garnets with low Al concentration. The γ-Al 2 O 3 coating demonstrates fast-ion conducting Al-doped Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 phase with low Al concentration (~0.17 mol per formula unit), low tetragonal-to-cubic phase transformation temperature of 500 °C, and total conductivity of ~4.4 × 10 − 4 S cm − 1 . Specifically, the desired microstructures of the sintered pellets with uniform grains are revealed. As a proof-of-concept, we demonstrate that the nanoscale γ-Al 2 O 3 modification garnet conductor Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 is available to suppress lithium dendrites in symmetric Li/γ-Al 2 O 3 coating Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 /Li cells during lithium plating/stripping at room temperature, with current densities of 0.026 to 0.5 mA cm − 2 . The Li/γ-Al 2 O 3 coating Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 /LiNi 0.5 Co 0.2 Mn 0.3 O 2 cell delivered a high initial discharge capacity of ~164.2 mAh g − 1 , more importantly, an outstanding cycling performance with a capacity retention of 90.16% after 30 cycles at 0.1C and room temperature. This new synthesis route and the utilization of nanoscale γ-Al 2 O 3 surface modification could open up new avenue to lithium garnet conductors with reliable synthesis for all-solid-state lithium batteries application.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Jingguang Yi,Dan Zhou,Yuhao Liang,Hong Liu,Haifang Ni,Li-Zhen Fan
All-solid-state lithium batteries (ASSLBs) employing sulfide electrolyte and lithium (Li) anode have received increasing attention due to the intrinsic safety and high energy density. However, the thick electrolyte layer and lithium dendrites formed at the electrolyte/Li anode interface hinder the realization of high-performance ASSLBs . Herein, a novel membrane consisting of Li 6 PS 5 Cl (LPSCl), poly(ethylene oxide) (PEO) and Li-salt (LiTFSI) was prepared as sulfide-based composite solid electrolyte (LPSCl-PEO3-LiTFSI) (LPSCl:PEO = 97:3 wt/wt; EO:Li = 8:1 mol/mol), which delivers high ionic conductivity (1.1 × 10 −3 S cm −1 ) and wide electrochemical window (4.9 V vs. Li + /Li) at 25 °C. In addition, an ex-situ artificial solid electrolyte interphase (SEI) film enriched with LiF and Li 3 N was designed as a protective layer on Li anode (Li(SEI)) to suppress the growth of lithium dendrites. Benefiting from the synergy of sulfide-based composite solid electrolyte and ex-situ artificial SEI, cells of S-CNTs/LPSCl-PEO3-LiTFSI/Li(SEI) and Al 2 O 3 @LiNi 0.5 Co 0.3 Mn 0.2 O 2 /LPSCl-PEO3-LiTFSI/Li(SEI) are assembled and both exhibit high initial discharge capacity of 1221.1 mAh g −1 (135.8 mAh g −1 ) and enhanced cycling stability with 81.6% capacity retention over 200 cycles at 0.05 C (89.2% over 100 cycles at 0.1 C). This work provides a new insight into the synergy of composite solid electrolyte and artificial SEI for achieving high-performance ASSLBs .
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
界面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yanhua Zhang,Yuhang Mei,Xinglong Gao,Yumei Xiao,Zijun Tang,Xing Xiang,Jiadong Deng
The lithium dendrite problem of Li 7 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid electrolyte restricts the practical application and development of all-solid-state lithium batteries (ASSLBs). Herein, a LiPON interlayer with Li + conductive and electron non-conductive dynamic properties is constructed at the Li/LLZTO interface. Results show that the electronic conductivity of solid electrolyte after LiPON modification decreased by nearly three orders of magnitude, indicating that it has good ability to hinder electron conduction . The interlayer enhances the wettability between the Li metal anode and LLZTO, resulting in a decrease of battery resistance from 3400 Ω to 700 Ω. The critical current density of the ASSLBs increase from 0.1 mA cm −2 to 1.2 mA cm −2 at room temperature, and the battery cycle number increase from 31 h to over 1000 h. XPS deep etching results show that the LiPON/LLZTO interface has good electrochemical stability. The Kelvin probe force microscope displays a sharp increase in potential within the LiPON interlayer, indicating its successful hindrance of electron conduction to the solid electrolyte. The effective inhibition of lithium dendrites growth is due to LiPON can promote the Li + transmission from LLZTO solid electrolyte to Li anode, and also hinder the electron conduction to LLZTO to form lithium dendrites.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
界面工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Jingxian Zhang,Ning Zhao,Miao Zhang,Yiqiu Li,Paul K. Chu,Xiangxin Guo,Zengfeng Di,Xi Wang,Hong Li
Solid-state electrolytes with high ionic conductivity , large electrochemical window, good mechanical properties , and easy processability are needed for high-energy solid-state lithium batteries . In this work, composite membranes consisting of lithium garnet (i.e. Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , LLZTO) particles and Li-salt-free polyethylene oxides (PEOs) are produced as solid-state electrolytes. Li-ion-conducting particles in nano-scale are crucial for the enhancement of conductivity and the membranes containing ~40 nm LLZTO particles exhibit conductivities nearly two orders of magnitude larger than those with the micro-scale ones, which is attributed to the difference in specific surface area related to the percolation effect. Compared to the conventional PEO doped with lithium salt, the insulating PEO in PEO:LLZTO membrane electrolyte is conducive to the suppression of lithium dendrite growth owing to prohibition of current flow. With PEO:LLZTO membrane electrolytes in conductivity of 2.1×10 −4 S cm −1 at 30 °C and 5.6×10 −4 S cm −1 at 60 °C, the solid-state LiFePO 4 /PEO:LLZTO/Li and LiFe 0.15 Mn 0.85 PO 4 /PEO:LLZTO/Li cells deliver energy densities of 345 Wh kg −1 (662 Wh L −1 ) and 405 Wh kg −1 (700 Wh L −1 ) (without the package weight or volume) with good rate capability and cycling performance. This study suggests that the conjunction of nano-scale Li-ion-conducting particles and an insulating polymer provides a promising solution to produce powerful solid-state electrolytes for high-performance solid-state lithium batteries .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子科学
·
固态电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Qin Wang,Yingjun Li,Baocang Liu,Guangran Xu,Geng Zhang,Qi Zhao,Jun Zhang
A series of well-dispersed bimetallic Pd@Pt nanodendrites uniformly supported on XC-72 carbon black are fabricated by using different capping agents. These capping agents are essential for the branched morphology control. However, the surfactant adsorbed on the nanodendrites surface blocks the access of reactant molecules to the active surface sites, and the catalytic activities of these bimetallic nanodendrites are significantly restricted. Herein, a facile reflux procedure to effectively remove the capping agent molecules without significantly affecting their sizes is reported for activating supported nanocatalysts. More significantly, the structure and morphology of the nanodendrites can also be retained, enhancing the numbers of active surface sites, catalytic activity and stability toward methanol and ethanol electro-oxidation reactions. The as-obtained hot water reflux-treated Pd@Pt/C catalyst manifests superior catalytic activity and stability both in terms of surface and mass specific activities, as compared to the untreated catalysts and the commercial Pt/C and Pd/C catalysts. We anticipate that this effective and facile removal method has more general applicability to highly active nanocatalysts prepared with various surfactants, and should lead to improvements in environmental protection and energy production.
研究领域:
纳米催化
·
电化学
·
材料化学
·
能源化学
·
表面科学
·
燃料电池
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yuexiu Du,Chongwu Liu,Yunzhao Liu,Qi Han,Xiaowei Chi,Yu Liu
Rechargeable metal batteries are desirable for next-generation high specific energy electrochemical energy storage systems . However, low coulombic efficiency and severe dendrite growth during the stripping/plating of metals (e.g. Li, Na, Zn and etc.) considerably hinder their practical applications. To address the above issues, in this work, a facile, versatile, and scalable approach by means of spray depositing carbon fiber micron film (CFMF) onto metals is developed. The porous, uniform, and highly conductive CFMF firmly attached to metal surface with a scaffold structure is found to effectively guide the uniform plating/stripping of both the Zn metal in aqueous electrolytes and the Li metal in organic electrolytes, thus enabling much higher efficiencies of Zn (98.4%) and Li (99.7%) for the 100th cycle on the CFMF-modified current collectors than those of bare current collectors. And the so far record high cycling stability for the symmetric cells using CFMF/Zn (2500 h) and CFMF/Li (1000 h) electrodes is achieved at 1 mA cm −2 and 4 mA cm −2 , respectively. Benefiting from the delicately designed CFMF-modified Zn or Li metal anodes , the full cells of Zn–MnO 2 and Li–LiMn 2 O 4 are rendered excellent rate capability and significantly extended cycle life.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 31
·1801420
·
IF 9.598
Kuirong Deng,Jiaxiang Qin,Shuanjin Wang,Shan Ren,Dongmei Han,Min Xiao,Yuezhong Meng
A novel single-ion conducting polymer electrolyte (SIPE) membrane with high lithium-ion transference number, good mechanical strength, and excellent ionic conductivity is designed and synthesized by facile coupling of lithium bis(allylmalonato) borate (LiBAMB), pentaerythritol tetrakis (2-mercaptoacetate) (PETMP) and 3,6-dioxa-1,8-octanedithiol (DODT) in an electrospun poly(vinylidienefluoride) (PVDF) supporting membrane via a one-step photoinitiated in situ thiol–ene click reaction. The structure-optimized LiBAMB-PETMP-DODT (LPD)@PVDF SIPE shows an outstanding ionic conductivity of 1.32 × 10 −3 S cm −1 at 25 °C, together with a high lithium-ion transference number of 0.92 and wide electrochemical window up to 6.0 V. The SIPE exhibits high tensile strength of 7.2 MPa and elongation at break of 269%. Due to these superior performances, the SIPE can suppress lithium dendrite growth, which is confirmed by galvanostatic Li plating/stripping cycling test and analysis of morphology of Li metal electrode surface after cycling test. Li|LPD@PVDF|Li symmetric cell maintains an extremely stable and low overpotential without short circuiting over the 1050 h cycle. The Li|LPD@PVDF|LiFePO 4 cell shows excellent rate capacity and outstanding cycle performance compared to cells based on a conventional liquid electrolyte (LE) with Celgard separator. The facile approach of the SIPE provides an effective and promising electrolyte for safe, long-life, and high-rate lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 2
·140
·
IF 2.8
Ma Di,He Hao,Huang Xinglan,Wang Jingcheng,Hu Xuebu
The inhomogeneous plating/stripping of zinc and side reactions originating from the dissolution of the cathode material in water lead to the poor stability of zinc anode, which inevitably limits the practical application of zinc-based aqueous batteries. Therefore, a novel hydrogel electrolyte made of hydroxyethyl cellulose/polyacrylamide (HEC/PAM) with a 3D network-like structure is synthesized by radical polymerization and cross-linking reinforcement. Thanks to the porous crosslinked network and massive hydrophilic groups, the electrolyte has high ion conductivity of 3.17 × 10 –2 S cm −2 and decomposition voltage of 2.6431 V. The ion conductive hydrophilic groups facilitate the interfacial compatibility of the electrode with the electrolyte and stabilize zinc plating/stripping, which suppresses the formation of zinc dendrites. Meanwhile, the hydrogel electrolyte effectively alleviates the dissolution of the positive electrode and the occurrence of side reactions, and subsequently improves the stability of the electrode. As a result, the assembled Zn–Zn symmetric cell with HEC/PAM hydrogel electrolyte is stable without short circuit and rapid increase of overvoltage at 5 mA cm −2 . The polarization voltage of the assembled Zn–Cu half-cell is 59.2 mV and initial coulomb efficiency reaches 94.3%. The assembled Zn–V 2 O 5 ·nH 2 O/CNT full cell delivers an excellent cycling stability of 186.9 mAh g −1 at 0.5 A g −1 after 500 cycles with a high-capacity retention of 92.5% (only 52.1% in aqueous system). The new idea is provided for further development of functional hydrogel electrolytes in zinc-ion batteries.
研究领域:
电化学
·
能源材料
·
功能高分子
·
电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）