JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Wenhao Ren,Yafang Zhang,Ruixin Lv,Shiyuan Guo,Wenjia Wu,Yong Liu,Jingtao Wang
Solid-state polymer electrolytes , featuring excellent processability and flexibility, have received considerable attentions. However, the inherent low ionic conductivity , especially at subzero temperatures, limits their widespread application. Herein, quasi-solid polymer electrolyte (QSPE) with high low-temperature ionic conduction ability is prepared by in-situ ring-opening polymerization of 1,3-Dioxlane with fluoroethylene carbonate (FEC) as plasticizer . The in-situ polymerization imparts good interface contact between QSPE and electrode. The addition of FEC improves the chain mobility and facilitates the dissociation of LiTFSI, giving QSPE a remarkable ionic conductivity and Li + transference number (2.4 × 10 −5 S cm −1 at −60 °C and 0.55 at −20 ° C), two orders of magnitude and 2.3 times higher than those of liquid electrolyte , respectively. As a result, the Li/QSPE/Li cell without significant polarization is obtained, which can operate at 0.2 mA cm −2 and 0 °C for 850 h. Moreover, the LiFePO 4 /Li cell exhibits excellent cycling stability at 0.2 C and 0 °C: its capacity remains 125.2 mAh g −1 at 400th cycle, exceeding most polymer electrolytes . Even at −20 °C, a discharge capacity of 73.3 mAh g −1 is obtained at 100th cycle under 0.2 C.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shuohan Wang,Jian Li,Tengfei Li,Weiguo Huang,Lihua Wang,Shengdong Tao
The chasing for all-solid-state lithium-ion batteries (ASSLIBs) is based on the need for safer and higher energy density batteries. In this regard, solid polymer electrolytes (SPEs) are well-renowned for their processability and electrochemical stability, yet slimmer and more flexible SPE with higher ionic conductivity is still desired. Herein, an ultrathin (35 µm), rigidity-enhancing co-blending SPEs design using electrospinning was proposed, blending bio-polyamide with a N -substituted pyrrolidone ring (IBD) with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI). IBD is confirmed to possess the dominant Li + affinity. Then IBD with flexible chain segments of PEO, triggers a concerted ion-transport mechanism synergistically, in which IBD is responsible for the processes of enhanced ion-pair dissociation resulting in dynamic association between the mobile cations and the long-chain molecules that constitute the SPE. Meanwhile, it could broaden the ion transport channel in some extent. The ionic conductivity of the SPE is up to 4.26 × 10 −4 S cm −1 at 50 ℃. Furthermore, the high strength modulus, low crystallinity, and ultra-thin characteristic of IBD-PEO/LiTFSI power-assisted the ASSLIBs of LiFePO 4 //Li to achieve extraordinary cycle performance (80.5 % capacity retention after 580 cycles at C/2 rate) and the average coulomb efficiency exceeds 99.5 % at 50 ℃. Moreover, it has the ability to withstand folding and bending conditions.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2021
·
IF 9.127
Yingmin Jin,Xin Zong,Xuebai Zhang,Chaojun Liu,Dong Li,Zhenggang Jia,Gen Li,Xuanguang Zhou,Junhua Wei,Yueping Xiong
Composite solid electrolyte (CSE) consisting of Li + conductive fillers and polymer matrix has become attractive for high energy-density lithium batteries . Current researches focus on the “ceramic in polymer”-type CSE due to the severe agglomeration of ceramic particles. Consequently, the destroyed percolation network impedes the further improvement in ionic conductivity . In this work, we report a novel structural design of ceramic-enriched CSE consisting of three-dimensional (3D) interconnected Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), polyvinylidene fluoride (PVDF) and LiN(SO 2 ) 2 (CF 3 ) 2 (LiTFSI). The 3D LATP network is constructed through the surface functionalization of LATP particles by polymethyl methacrylate (PMMA). Owing to the intermolecular interaction between PMMA and PVDF, the incorporation of PMMA-coated LATP (denoted as LATP@PMMA) enables the uniform distribution of ceramic phase and generates interconnected LATP network. Noticeably, such an electrolyte maximizes the utilization of inorganic fillers through the facile treatment of zero-dimensional materials, which is comparable to those 3D template-derived fillers. Furthermore, continuous Li + conduction pathways through LATP framework and LATP/PVDF interphase are guaranteed by the enhanced affinity of LATP towards PVDF matrix and the intrinsic Li + complexation capability of PMMA. Remarkable cycling performances of the LiNi 0.5 Co 0.2 Mn 0.3 O 2 /LATP@PMMA-PVDF/Li batteries confirm the feasibility of 3D ceramic-enriched composite electrolyte in the application of solid-state lithium batteries.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2024
·Vol. 45
·期 7
·2300645
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IF 4.2
Chengliang Wang,Xu Zhang,Xiaofei Sun,Yan Zhang,Qingfu Wang,Jingjiang Sun
In this work, hyperbranched polycarbonate-poly(ethylene oxide) (PEO)-based solid polymer electrolytes (HBPC-SEs) are successfully synthesized via a straightforward organo-catalyzed “A 1 ”+“B 2 ”-ring-opening polymerization approach. The temperature-dependent ionic conductivity of HBPC-SEs, composed of different polycarbonate linkages and various LiTFSI concentrations, is investigated. The results demonstrate that HBPC-SE with an ether-carbonate alternating structure exhibits superior ionic conductivity, attributed to the solubility of Li salts in the polymer matrix and the mobility of the polymer segments. The HBPC1-SE with 30 wt% LiTFSI presents the highest ionic conductivities of 2.15 × 10 −5 , 1.78 × 10 −4 , and 6.07 × 10 −4 Scm −1 at 30, 60, and 80 °C, respectively. Compared to traditional PEO-based electrolytes, the incorporation of polycarbonate segments significantly enhances the electrochemical stability window (5 V) and Li + transference number (0.53) of HBPC-SEs. Furthermore, the LiFePO 4 /HBPC1-SE-3/Li cell exhibits exceptional rate capability and long-cycling performance, maintaining a discharge capacity of 130 mAh g −1 at 0.5C with a capacity retention of 95% after 300 cycles.
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
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Yongquan Zhang,Hongchang Gao,Jingshun Wang,Qingguo Chi,Tiandong Zhang,Changhai Zhang,Yu Feng,Yue Zhang,Dianxue Cao,Kai Zhu
All-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage batteries due to their high energy density and high safety. Polyethylene oxide (PEO) is an ideal solid-state electrolyte due to its high chain flexibility, high dielectric constant, and strong dissociation ability towards lithium salts. However, the application of PEO is severely hindered by drawbacks such as low ion conductivity at room temperature and low electrochemical window. In this work, we constructed a Li1.25Al0.25Zr1.75(PO4)3 (LAZP)/PEO composite solid-state electrolyte (CSSE) with improved ion conductivity, enlarged electrochemical window, and stable charge–discharge cycle performance. The CSSE leads to an obvious LiF layer and Li2CO3 formation at the interface of lithium metal. Meanwhile, the addition of LAZP reduces the side reaction between PEO and the lithium metal significantly and suppresses the deterioration of ion conductivity. In addition, we modified LiFePO4 (M-LFP), the cathode sheet of the ASSLMBs, by adding an appropriate proportion of multi-walled carbon nanotubes (MWCNTs), PEO and lithium bis(trifluoromethane sulfonimide) (LiTFSI) to improve the ionic and electronic conductivity inside the cathode of the ASSLMBs. The Li/CSSE/M-LFP full cell exhibits a specific discharge capacity of 152 mA h g−1 at 60 °C and 2 C rate and a capacity retention rate of 93.5% after 200 cycles at 1 C. This work demonstrates an effective strategy for increasing the specific capacity, rate ability and long-cycle performance of ASSLMBs.
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
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Liu-bin SONG,Tian-yuan LONG,Min-zhi XIAO,Min LIU,Ting-ting ZHAO,Yin-jie KUANG,Lin JIANG,Zhong-liang XIAO
A composite solid electrolyte comprising a Cu−Al bimetallic metal-organic framework (CAB), lithium salt (LiTFSI) and polyethylene oxide (PEO) was fabricated through molecular grafting to enhance the ionic conductivity of the PEO-based electrolytes. Experimental and molecular dynamics simulation results indicated that the electrolyte with 10 wt.% CAB (PL-CAB-10%) exhibits high ionic conductivity (8.42×10 −4 S/cm at 60 °C), high Li + transference number (0.46), wide electrochemical window (4.91 V), good thermal stability, and outstanding mechanical properties. Furthermore, PL-CAB-10% exhibits excellent cycle stability in both Li−Li symmetric battery and Li/PL-CAB- 10%/LiFePO 4 asymmetric battery setups. These enhanced performances are primarily attributable to the introduction of the versatile CAB. The abundant metal sites in CAB can react with TFSI − and PEO through Lewis acid–base interactions, promoting LiTFSI dissociation and improving ionic conductivity. Additionally, regular pores in CAB provide uniformly distributed sites for cation plating during cycling.
研究领域:
材料科学
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电化学
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电池技术
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聚合物科学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Tao Wei,Zhimeng Wang,Mi Zhang,Qi Zhang,Jiahao Lu,Yanyan Zhou,Cheng Sun,Zidong Yu,Yu Wang,Man Qiao,Sai Qin
As a common filler in polymer electrolytes , Metal-organic frameworks (MOFs) has been studied extensively in recent years. In this study, we propose a novel solid composite electrolytes (SCEs) based on PEO/LiTFSI/a-MIL-100 (Fe)/PVDF by using a straightforward solution-casting method. Unactivated and activated MIL-100 (Fe) (a-MIL-100 (Fe)) as the fillers were compared, and the interactions of functional groups of unactivated MIL-100 (Fe) and a-MIL-100 (Fe) with anions of electrolyte salts through Lewis acid-base interaction are studied with density functional theory (DFT) calculations. The influences of different a-MIL-100 (Fe) contents on electrochemical performances were also examined. The Li/SCEs/LiFePO 4 cell displayed high average discharge capacities of 161.8 mAh g −1 , 166.8 mAh g −1 , 158.9 mAh g −1 , 146.2 mAh g −1 and 92.6 mAh g −1 at the rate of 0.1, 0.2, 0.5, 1 and 2 C at 60 ℃, respectively, without liquid electrolytes. This work might provide new insight into the role of activated MOFs fillers in polymer electrolytes.
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
高影响因子
Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 6
·2100193
·
IF 0
Genxi Yu,Long Pan,Heng Zhang,Yaping Wang,Kai Li,Daming Chen,Jian Chen,Zheng Ming Sun
Composite polymer electrolytes (CPEs) are promising for the realization of solid-state lithium metal batteries (SSLMBs) with high energy density and safety. However, CPEs suffer from insufficient ionic conductivity and low mechanical strength at thin films. Herein this study, a porously nanofibrous Li 7 La 3 Zr 2 O 12 (LLZO)/polyacrylonitrile (PAN) substrate prepared by electrospinning is filled with polyethylene oxide (PEO)/lithium salt (LiTFSI) to form LLZO/PAN/PEO/LiTFSI (LPPL) CPEs. The robust LLZO/PAN nanofibrous membrane mechanically supports the soft PEO/LiTFSI, while the dispersed LLZO together with the PEO/LiTFSI forms a dual Li + conductive pathway. Benefiting from the great synergies between the building blocks, the obtained LPPL CPEs possess a high tensile strength (8.2 MPa) with a thickness of only 20 μm, resulting in a good ionic conductivity. In addition, the LPPL CPEs also exhibit a wide electrochemical window (5.5 V), high thermal stability, and excellent stability with lithium metal. As a result, the LiFePO 4 (LFP)/LPPL/Li SSLMBs show good rate capability and cycling stability (100.5 mA h g −1 @1.0 C after 430 cycles) at 60 °C. In addition, the soft-packaged LFP/LPPL/Li SSLMBs demonstrate high safety under destructive conditions such as bending and cutting. Moreover, the LPPL CPEs are also applicable to the SSLMBs with high-energy LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) or high-capacity sulfur cathodes.
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
DOI
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Ning Zhou,Yufeng Wang,Yang Zhou,Jinyou Shen,Yong Zhou,Yong Yang
Star-shaped polymeric ionic liquids (PIL-3 and PIL-4) based on poly(2-(dimethyl-ethyl-amino)ethyl methacrylate) bis(trifluoromethylsulfonyl)imide (P(EtDMAEMA-TFSI)) with three-arm and four-arm architectures were prepared through atom transfer radical polymerization (ATRP) and ion exchange. Subsequently, gel polymer electrolytes (GPEs) comprising PIL host, N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide (DEME-TFSI) ionic liquid (IL) plasticizer with the same anion unit and LiTFSI salt were obtained. Compared with the linear PIL possessing the same elements, the increase of branches for PIL decreases the crystallity and glass transition temperature (T g ) of the corresponding GPEs. Accordingly, the ionic conductivity , electrochemical window and ion transport number of three-arm and four-arm PILs based GPEs (PIL-GPE-3 and PIL-GPE-4) are obviously superior to the linear contrastive sample. Among lithium metal batteries assembled by linear, three-arm and four-arm PILs based GPEs, Li/PIL-GPE-4/LiFePO 4 presents the best performance. The specific discharge capacity attains 151 mAh g −1 at 0.1 C, the capacity retention ratio achieves 93.6% after 100 cycles at 60 °C, and the coulombic efficiency is around 99%. The outstanding compatibility between PIL-4 and IL and the resulted interfacial stability between PIL-GPE-4 and electrodes both contribute to the excellent performance.
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
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Ting Zhao,Weijie Kou,Yafang Zhang,Wenjia Wu,Wenpeng Li,Jingtao Wang
Succinonitrile (SN) plastic crystal electrolyte holds great promise for high-performance solid-state lithium metal batteries due to its high ionic conduction. However, the serious side reaction between SN and lithium anode always causes large interfacial resistance , deteriorating the battery capacity. Herein, we penetrated LiTFSI-SN (LSN) electrolyte into the interlayer channels of laminar metal-organic framework (MOF), then an ultra-thin and stable laminar LiTFSI–SN–MOF composite solid-state electrolyte (LSN-MOF CSE) was obtained. We demonstrate that the interlayer nanochannels for LSN electrolyte storage without sacrificing the mobility of SN molecules. Meanwhile, the unsaturated coordination of MOF, induced by Co/Ni metal sites, causes a horizontal arrangement of SN. Therefore, this electrolyte offers a remarkable ionic conductivity of 7.41 × 10 −4 S cm −1 at 25 °C. Moreover, the interlayer nanochannels and covalent interaction of MOF synergistically suppress the migration of SN to lithium anode, thus improving the interface stability of lithium anode. Importantly, the assembled Li symmetrical cell performs stable operation over 800 h under 0.2 mA cm −2 , and the LiFePO 4 /Li cell delivers excellent cycling stability of 148.2 mAh g −1 with a low capacity decay of 0.048% per cycle after 200 cycles under 0.2C and 25 °C.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qingshuai Xu,Xuejun Lai,Gaige Zhang,Tan Li,Yongcai Qiu
Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is widely employed in lithium metal batteries (LMB) owing to its capacity for efficiently mitigating the growth of lithium dendrites and enhancing the interface stability of lithium metal anodes. Unfortunately, LiTFSI frequently causes severe aluminum (Al) corrosion and leads to LMB failure. To address this issue, we conducted solvation structure design in the electrolyte using co-solvents such as 1,2-diethoxyethane, fluoroethylene carbonate and adiponitrile. Both experimental and computational evidences demonstrate that the co-solvents can regulate the solvation structure of electrolyte and promote the formation of more anion-rich internal solvation shells, ultimately enhancing the interfacial stability of Li anode and Al collector. When paired with high-loading LiFePO 4 cathode, the full cell exhibits a long-term lifespan (1000 cycles) and outstanding capacity retention (86.4 %). Even the full cell with stringent conditions of NMC811 (∼4.0 mAh cm −2 ), 50 μm thin Li (N/P = 2.5) and the optimized electrolyte still enables to output over 110 cycles and 80.0 % capacity retention. This work provides an efficacious and innovative strategy to stabilize Li metal anode and Al current collector through solvation structure regulation.
研究领域:
材料科学
·
电化学
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储能技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Hao Xu,Ailian Wang,Xu Liu,Di Feng,Shi Wang,Jie Chen,Yan An,Liaoyun Zhang
The trade-off between ionic conductivity and mechanical strength is still a great challenge for all-solid-state polymer electrolyte . Herein, a novel structure-controlled fluorine-containing star-branched polymer (HBPS-(PTFEMA- b -PPEGMA) 27 ) with a hyperbranched polystyrene core and polytrifluoroethyl methacrylate-block-poly (ethylene glycol) methyl ether methacrylate arms is synthesized by atom transfer radical polymerization . Combining the good mechanical strength of fluorine-containing segments and flexible property of PEG segments, the prepared HBPS-(PTFEMA- b -PPEGMA) 27 /LiTFSI solid polymer electrolyte can form flexible transparent self-standing membrane and exhibits the high ionic conductivity of 2.4 × 10 −5 S cm -1 at 25 °C, as well as good thermal stability with the thermal decomposition temperature of 374.7 °C. It also possesses a wide electrochemical window of 4.9 V and good interfacial compatibility. Moreover, the Li/LiFePO 4 cell based on this solid state star-branched polymer electrolyte membrane delivers a high discharge capacity of 147.2 mAh g −1 under a current density of 0.1C at 60 °C.
研究领域:
材料科学
·
电化学
·
聚合物化学
·
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）