Inorganic composite solid electrolyte
225160971
g C 3 N 4 Derivative Artificial Organic/Inorganic Composite Solid Electrolyte Interphase Layer for Stable Lithium Metal Anode
Shufen Ye Lifeng Wang Fanfan Liu Pengcheng Shi Haiyun Wang Xiaojun Wu Y H Yu
199071322
A novel organic/inorganic composite solid electrolyte with functionalized layers for improved room temperature rate performance of solid state lithium battery
International Journal of Energy Research
Mao-xiang Jing Chong Han Hua Yang Song Hua Fei Chen Li-li Chen Zu-xu Zhou Bo-wei Ju Fei-yue Tu Xiang-qian Shen
232232431
Preparation and Characterization of Lithium Ion Conductive Organic/Inorganic Composite Solid Electrolyte.
The purpose of this study was to improve the ionic conductivity and physical properties of a polymer electrolyte by complexing it with ceramic particles. First, a polymer/ceramic composite solid electrolyte was prepared by synthesizing a super porous silica aerogel powder and adding it to a slurry containing a polyethylene oxide (PEO) based polymer electrolyte; then, the electrochemical properties of electrolyte of different compositions were confirmed. PEO and polymethyl methacrylate (PMMA) were copolymerized, the optimum ratio of lithium salt, plasticizer, and silica aerogel was determined, and ion conductivity of the composite electrolyte was improved. When the EO:Li ratio was 10:1, the glass transition temperature was the lowest, and the room temperature ion conductivity was improved to 3.0 x 10 5 S/cm. As a result of XRD and thermal analysis, it was confirmed that the stability and durability of the electrolyte interface can also be improved by complexation of the polymer electrolyte with ceramic particles.
Journal of nanoscience and nanotechnology
Kang O Kim Eun-jeong Yi Hae Jin Hwang
210805322
Free standing sulfide/polymer composite solid electrolyte membranes with high conductance for all solid state lithium batteries
Abstract Bulk type all solid state lithium batteries (ASSLBs) with high theoretical capacity and good safety are considered to be promising candidates as future energy storage devices. The ASSLBs with inorganic electrolytes usually have a thick electrolyte layer (more than 1 mm) which significantly reduces the cell based energy density; therefore, a free standing high conductance electrolyte layer with a low thickness is essential for high performance ASSLBs. In this work, we prepare free standing 78Li2S 22P2S5 glass ceramic (7822gc) composite solid electrolyte membranes reinforced with polymer electrolytes with a thickness of 120 mm through a liquid phase method and systematically investigate the effects of solvents and polymer electrolytes on the microstructure and electrochemical properties of the 7822gc/polymer composite membranes. The sulfide/PEO and sulfide/PVDF composite electrolytes without lithium salt show an ionic conductivity of 2 4 x 10 4 S cm 1 at room temperature, while the conductivity of those with lithium salt is enhanced to 4 7 x 10 4 S cm 1. With such a high conductivity and low thickness, an ultra high areal conductance of 59.0 mS cm 2 is obtained for the composite electrolyte membranes, which is ~2.7 times of that of pure 7822gc electrolyte pellets. All solid state lithium sulfur batteries (ASSLSBs) with a sulfur/carbon nanotube composite cathode and a Li In alloy anode are prepared. The cell based energy density is as high as 87.0 Ah L 1. A discharge capacity of 725.1 mA h g 1 at 0.176 mA cm 2 after 100 cycles and a high capacity retention of 93.2% are achieved for the cells with 7822gc/polymer composite electrolyte membranes.
Yibo Zhang Rujun Chen Shuo Wang Ting Liu Bingqing Xu Xue Zhang Xinzhi Wang Yang Shen Yuanhua Lin Ming Li Li-Zhen Fan Liangliang Li Ce-Wen Nan
234003480
Flexible Composite Solid Electrolyte with an Active Inorganic Filler
Solid polymer electrolytes (SPEs) attract great attention due to their wide electrochemical stability window, low cost, and excellent processability. However, some obstacles, including their low io.
Yiyang Sun Jialu Wang Daosong Fu Zhicheng Wang Xiaodong Wu
216376589
Integrated lithium metal anode protected by composite solid electrolyte film enables stable quasi solid state lithium metal batteries
Abstract Lithium (Li) metal, possessing an extremely high theoretical specific capacity (3860 mAh/g) and the most negative electrode potential 3.040 V vs. standard hydrogen electrode) is one the most favorable anode materials for future high energy density batteries. However, the poor cyclability and safety issues induced by extremely unstable interfaces of traditional liquid Li metal batteries have limited their practical applications. Herein, a quasi solid battery is constructed to offer superior interfacial stability as well as excellent interfacial contact by the incorporation of Li@composite solid electrolyte integrated electrode and a limited amount of liquid electrolyte (7.5 mL/cm2) By combining the inorganic garnet Al doped Li6.75La3Zr1.75Ta0.25O12 (LLZO) with high mechanical strength and ionic conductivity and the organic ethylene vinyl acetate copolymer (EVA) with good flexibility, the composite solid electrolyte film could provide sufficient ion channels, sustained interfacial contact and good mechanical stability at the anode side, which significantly alleviates the thermodynamic corrosion and safety problems induced by liquid electrolytes. This innovative and facile quasi solid strategy is aimed to promote the intrinsic safety and stability of working Li metal anode, shedding light on the development of next generation high performance Li metal batteries.
Jun-Fan Ding Rui Xu Chong Yan Ye Xiao Yeru Liang Hong Yuan Jia-Qi Huang
225140272
Ameliorating the interfacial issues of all solid state lithium metal batteries by constructing polymer/inorganic composite electrolyte
Abstract Lithium metal is one of the most promising anodes for next generation batteries due to its high capacity and low reduction potential. However, the notorious Li dendrites can cause the short life span and safety issues, hindering the extensive application of lithium batteries. Herein, we integrate Li7La3Zr2O12 (LLZO) ceramic into polyethylene oxide (PEO) to construct a facile polymer/inorganic composite solid state electrolyte (CSSE) to inhibit the growth of Li dendrites and widen the electrochemical stability window. Given the feasibility of our strategy, the designed PEO LLZO LiTFSI composite solid state electrolyte (PLL CSSE) exhibits an outstanding cycling property of 134.2 mAh g 1 after 500 cycles and the Coulombic efficiency of 99.1% after 1000 cycles at 1 C in LiFePO4 Li cell. When cooperated with LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode, the PLL CSSE renders a capacity retention of 82.4% after 200 cycles at 0.2 C. More importantly, the uniform dispersion of LLZO in PEO matrix is tentative tested via Raman and FT IR spectra and should be responsible for the improved electrochemical performance. The same conclusion can be drawn from the interface investigation after cycling. This work presents an intriguing solid state electrolyte with high electrochemical performance, which will boost the development of all solid state lithium batteries with high energy density.
Journal of Energy Chemistry
Su Wang Qifang Sun Wenxiu Peng Yue Ma Yingsan Zhou Dawei Song Hongzhou Zhang Xixi Shi Chunliang Li Lianqi Zhang
224960708
Ionic liquid enhanced composite solid electrolyte for high temperature/long life/dendrite free lithium metal batteries
Abstract The composite solid electrolytes (CSEs) inherits the high safety of the inorganic solid electrolyte and the easy processing of the organic polymer electrolyte, thereby exhibiting a broad application prospect. However, the performance of the CSE was hard to realizing its practical application in lithium metal batteries. Herein, the significant impact of CSE performance brought about by the addition of ionic liquids was studied and summarized: significantly increase ionic conductivity; constructing a viscoelastic interface between electrode and electrolyte to reduce the interface impedance; forming a stable and LiF rich SEI at the negative electrode to inhibit the growth of lithium dendrites; wetting the LiFePO4 porous cathode. The LiFePO4/CSE 60/Li battery displays high initial discharge specific capacity of 158.2 mAh g 1 and a capacity retention of 86.3% after 400 cycles at 1 C at 55 degC, and with coulombic efficiency of 99.7% The surface of the lithium metal anode after long term cycling exhibits to dendrite free morphology. This research highlights the critical role that ionic liquids play in improving the performance of CSEs and will shed light on designing CSEs for LMB practical applications.
Yun Yang Qian Wu Dexin Wang Chenchong Ma Zhenghui Chen Qinting Su Caizhen Zhu Cui-hua Li
224911360
A flexible composite solid electrolyte with a highly stable interphase for dendrite free and durable all solid state lithium metal batteries
Composite solid state electrolytes (CSEs) that integrate the merits of different components are considered to be promising candidates for next generation high energy density lithium metal batteries. Herein, we have successfully designed a flexible CSE membrane consisting of the ceramic conducting Li1.3Al0.3Ti1.7(PO4)3 (LATP) filler, polyethylene oxide (PEO) matrix, and 1 butyl 1 methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (BMP TFSI) ionic liquid. In particular, the addition of ionic liquid (BMP TFSI) can not only decrease the interface impedance between the polymer and LATP ceramic fillers and improve the ionic conductivity, but also prevent the adverse reaction between Ti4+ in LATP and Li metal and further enhance the interface stability. Benefitting from the synergistic effect of organic inorganic hybrids, the obtained composite electrolyte membrane achieves an excellent ionic conductivity of 2.42 x 10 4 S cm 1 at 30 degC and a wide electrochemical stability window of 5 V (vs. Li+/Li) Moreover, the CSE membrane exhibits outstanding Li dendrite suppression capability, which is proved by galvanostatic Li plating/stripping tests for 1000 h. Assembled with this solid electrolyte membrane and a commercial LiFePO4 cathode, all solid state lithium metal batteries demonstrate superior rate capability and outstanding cycling stability at both 30 and 45 degC. These results demonstrate that such a flexible composite electrolyte is a promising alternative electrolyte for practical high energy density all solid state batteries.
Dechao Zhang Xijun Xu Xinyue Huang Zhicong Shi Zhuosen Wang Zheng-bo Liu Renzong Hu Jun Liu Min Zhu
140803338
Na Conductive Polymer/Inorganic Composite Electrolyte for Flexible All Solid State Battery
Koji Hiraoka