COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Xuelian Fu,Yuchao Li,Chengzhu Liao,Weiping Gong,Mingyang Yang,Robert Kwok Yiu Li,Sie Chin Tjong,Zhouguang Lu
Low ionic conductivity and large interfacial impedance between the electrode and electrolyte are the main bottleneck issues of the current solid electrolytes . In this study, a novel 3D hierarchical solid electrolyte was developed to tackle the large interfacial impedance problem. A flexible polyethylene oxide/lithium chlorate (PEO/LiClO 4 ) was in-situ formed inside the 3D porous Li 6.28 La 3 Zr 2 Al 0.24 O 12 (LLZAO) network by simply using a cleanroom wiper as the template. The obtained 3D LLZAO-PEO/LiClO 4 composite solid electrolyte exhibited a high ionic conductivity of 2.25 × 10 −5 S cm −1 at 30 °C, being 30.7 times higher than that of pristine PEO/LiClO 4 electrolyte. The improved ionic conductivity was attributed to the 3D porous LLZAO structure with continuous fast ion transport pathways. In addition, the 3D LLZAO network can effectively inhibited the growth of lithium dendrite , leading to excellent stability and desirable safety during lithium stripping/plating cycling. Furthermore, the all-solid-state LiFePO 4 /Li battery system based on the obtained 3D LLZAO-PEO/LiClO 4 electrolyte showed a high initial discharge specific capacity of 143.8 mAh·g −1 and a high capacity retention of 86% after 200 cycles at 60 °C. This 3D composite solid electrolyte design is very effective in reducing the interfacial impedance and provides a solution for the further development of high-performance solid electrolyte for all-solid-state rechargeable batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2024
·
IF 5
Genxi Yu,Youchun Wu,Dawei Sha,Jianwen Cai,Gaofa Nie,Yaping Wang,Long Pan,ZhengMing Sun
Garnet solid-state electrolytes (SSEs) have extraordinary application prospects due to their high room temperature ionic conductivity and high stability to lithium metal. However, when exposed to air during the preparation process, contaminants are inevitably generated on the electrolyte surface, resulting in poor wettability of the Li/garnet interface and high interfacial resistance. Moreover, solid-state batteries assembled with contaminated electrolytes can easily lead to the formation and expansion of lithium dendrites. Herein, we demonstrate a surface chemistry strategy of rapid vulcanization treatment to improve interface problems by introducing lithium sulfides into the garnet electrolyte. Compared to the surface contaminants (e.g., Li2CO3) on garnet, lithium sulfides (e.g., Li2S) have several advantages; it is a good Li+ conductor and has good wettability to both the garnet surface and Li metal anode. The interfacial resistance of the vulcanized garnet-SSE pellets decreased from 2961 Ω cm2 for LLZT@LC to 391 Ω cm2 for LLZT@LS. In addition, the lithium symmetric battery assembled by using LLZT@LS pellets exhibits stable plating/stripping cycling performance and ultralow overpotential at a current of 0.2 mA cm−2 without Li dendrite growth. Moreover, the LiFePO4/Li batteries with LLZT@LS pellets show excellent rate performances and cycling stability (114.3 mA h g−1 @ 0.5C after 150 cycles) with a capacity retention of 86%. These results demonstrate that the rapid treatment of garnet contaminants by a surface chemistry strategy is not only a simple and efficient solution but also provides strong support for the realization of high-performance solid-state lithium metal batteries (SSLMBs).
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
Journal of Energy Storage
·
2024
·
IF 8.9
Chenyao Wang,Xin Duan,Xinzhi Chen,Hairui Weng,Mingjuan Li,Luyi Sun,Yuan Li
When compared to traditional liquid electrolytes, solid electrolytes face significant challenges due to insufficient ionic conductivity and poor interfacial contact. To overcome these challenges, a cathode-supported double layer gradient structured solid polymer electrolyte membrane is developed. This innovative design enhances the wetting ability of the solid electrolyte on the cathode, leading to improved rate performance. Furthermore, the double layer solid electrolyte enhances mechanical strength, ensuring excellent cycling performance. As a result, the LiFePO 4 /Li solid state battery demonstrates superior battery performances, for instance, it can achieve a discharge capacity of 121 mAh g −1 at a current rate of 5C, with a capacity retention of 99 % after 380 cycles. This work offers a promising strategy for further enhancing the performance of all solid-state batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Qiang Lv,Yajie Song,Bo Wang,Shangjie Wang,Bochen Wu,Yutong Jing,Huaizheng Ren,Shengbo Yang,Lei Wang,Lihui Xiao,Dianlong Wang,Huakun Liu,Shixue Dou
Solid polymer electrolytes (SPEs) are one of the most promising alternatives to flammable liquid electrolytes for building safe Li metal batteries. Nevertheless, the poor ionic conductivity at room temperature (RT) and low resistance to Li dendrites seriously hinder the commercialization of SPEs. Herein, we design a bifunctional flame retardant SPE by combining hydroxyapatite (HAP) nanomaterials with N-methyl pyrrolidone (NMP) in the PVDF-HFP matrix. The addition of HAP generates a hydrogen bond network with the PVDF-HFP matrix and cooperates with NMP to facilitate the dissociation of LiTFSI in the PVDF-HFP matrix. Consequently, the prepared SPE demonstrates superior ionic conductivity at RT, excellent fireproof properties, and strong resistance to Li dendrites. The assembled Li symmetric cell with prepared SPE exhibits a stable cycling performance of over 1200 h at 0.2 mA cm −2 , and the solid-state LiFePO 4 ||Li cell shows excellent capacity retention of 85.3% over 600 cycles at 0.5 C.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Fei Lv,Kexin Liu,Zhuyi Wang,Jiefang Zhu,Yin Zhao,Shuai Yuan
The room and low-temperature performances of solid-state lithium batteries are crucial to expand their practical application. Polyethylene oxide (PEO) has received great attention as the most representative polymer electrolyte matrix. However, most PEO-based solid-state batteries need to operate at high temperature due to low room temperature ionic conductivity . Improving the ionic conductivity by adding plasticizers or reducing the crystallinity of PEO often compromises its mechanical strength . Here, an amorphous PEO-based composite solid-state electrolyte is obtained by ultraviolet (UV) polymerizing PEO and methacryloyloxypropyltrimethoxy silane (KH570)-modified SiO 2 which demonstrates both satisfactory mechanical performance and high ionic conductivity at room (3.37 × 10 −4 S cm −1 ) and low temperatures (1.73 × 10 −4 S cm −1 at 0 °C). In this electrolyte, the crystallinity of PEO is reduced through cross-linking, and therefore provides a fast Li + ions transfer area. Moreover, the KH570-modified SiO 2 inorganic particles promote the dissociation of lithium salts by Lewis acid centers to increase the ionic conductivity. Importantly, this kind of cross-linking networks endows the final electrolyte much higher mechanical strength than the pure PEO polymer electrolyte or PEO-inorganic filler blended systems. The solid-state LiFePO 4 /Li cell assembled with this electrolyte exhibits excellent cycling performance and high capacity at room and low temperatures.
研究领域:
材料科学
·
电化学
·
电池技术
·
聚合物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Wenyan Shang,Chaoqun Niu,Guangping Chen,Yubing Chen,Jie Du
Lithium metal shows great promise as an anode material for high-performance next-generation batteries due to its low redox potential , low weight, and high specific capacity. However, the uncontrolled growth of lithium dendrites during charge–discharge cycling limits the practical application of lithium metal anodes . In this work, an anion-inhibited solid framework polymer electrolyte (SFPE) was prepared through the polymerization of vinyl polyhedral oligomeric silsesquioxane (VPOSS) and diallyl dicarbonate (DDC) as a means to suppress lithium dendrite formation. The structure of the electrolyte was found to reduce the electric field at the anode surface by restricting the free movement of the anions (TFSI − ) of the lithium salt , which facilitated the orderly, uniform, and safe deposition of lithium ions on the anode. The SFPE presented a high lithium ion transference number (0.63), a wide window of electrochemical stability (5.6 V versus Li + /Li), and high ionic conductivity (0.31 mS cm −1 ) at 25 °C. A LiFePO 4 /Li cell containing the SFPE achieved a specific discharge capacity of 165 mAh g −1 and a capacity retention of 91.3% after 200 cycles at 0.1 C (1 C = 180 mAh g −1 ) and 25 °C, and the lithium anode surface remained smooth after 600 h of constant-current charge–discharge cycling. Based on these results, this SFPE is an excellent candidate for use in high-performance lithium metal batteries .
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Youlan Zou,Yanhong He,Huiyao Li,Shiyan Deng,Wenhao Tang,Shuang Deng
In order to solve the problems of low ionic conductivity, low lithium-ion transference number and weak mechanical strength of PEO solid polymer electrolytes (SPEs), this paper proposes to prepare composite cross-linked network polymer electrolytes (PEO-AAEM) through UV crosslinked polymerization of allyl acetoacetate (AAEM) and N- N -methylene diacrylamide (MBA) within the PEO SPEs. The amide group within the cross-linked network facilitates the dissociation of Li + , while the carbonyl group serves as a conduit for Li + transport. The PEO-AAEM SPEs exhibit the ionic conductivity of 5.4×10 −4 S cm −1 , with a lithium-ion transference number of 0.54 at 60 °C. The assembled Li//Li battery with proper AAEM content can be stably cycled for 2000 h at 0.2 mA cm −2 current, and LiFePO 4 //Li battery maintains a reversible capacity of 100 mA h g −1 after 500 cycles at 0.2C. This work offers a viable pathway for developing SPEs with improved electrochemical performance for all solid-state lithium metal batteries (ASSLMBs).
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
Yirui Lu,Xue Zhang,Chuanjiao Xue,Chengzhou Xin,Ming Li,Ce-wen Nan,Yang Shen
Replacing flammable liquid electrolytes with solid polymer electrolytes is a promising route to improve safety of lithium (Li)-metal batteries. However, developing a suitable high-performance electrolyte with both high ionic conductivity and interface stability against electrodes remains as a challenge. Herein, we design a poly(propylene carbonate) (PPC)/poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)]–based asymmetric solid electrolyte with a 3D blow-spun Li 7 La 3 Zr 2 O 12 (LLZO) framework. The controllable degradation of PPC facilitates the wettability and stability between the electrolyte and Li metal. The P(VDF-HFP) with good electrochemical stability is used to match with cathode. With the support of the 3D LLZO Li-ion conductor, the electrolyte displays high ionic conductivity (4.9 × 10 −4 S cm −1 at room temperature). The Li||Li symmetric cells assembled with this electrolyte show a long cycling life of more than 2700 h at 100 μA cm −2 . The electrolyte also delivers an excellent cycling performance in solid-state LiFePO 4 ||Li batteries (300 cycles with a capacity retention of 91.3%).
研究领域:
材料科学
·
电化学
·
电池技术
·
固态电解质
✓ 已验证
产品关联
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
·
2022
·
IF 16.744
Jiaqi Li,Long Chen,Fengling Wang,Zuoyu Qin,Ying Zhang,Ning Zhang,Xiaohe Liu,Gen Chen
Low lithium ion (Li + ) mobility and thermal stability of polyolefin separator are crucial obstacles that limit the utilization of Li metal electrodes in the age of rapid acceleration toward high-energy-density rechargeable batteries. Herein, we report anionic metal-organic frameworks (MOFs) modified separator to overcome the barriers. By grafting –SO 3 − group onto the Universitetet i Oslo (UIO) structure, the anionic MOFs nanoparticles are synthesized (noted as UIO-SOLi). The UIO-SOLi is adhered on the surface of Celgard 2400 via polyacrylic acid (PAA) to fabricate the modified separator (UIOSOL@PP). The MOFs coating optimizes the wettability and thermal stability of the pristine separator. Negatively charged moieties –SO 3 − within the pore surface electrostatically repel anions while facilitate the transport of Li + , thus achieving a high Li + transference number ( t Li + ) of 0.82. The effective Li + transport relieves the concentration polarization, regulates the Li + flow and realizes the uniform deposition of lithium. By implementing the UIOSOL@PP separator, the LiFePO 4 |Li cells deliver superior rate performance and cycling lifespan that renders a high discharge capacity retention of 155 mAh g −1 over 600 cycles at 1C. These results indicate that anionic MOFs modified separator is a promising strategy to modulate Li + flow and assist with efficient long-term operation of lithium metal batteries.
研究领域:
材料科学
·
电化学
·
电池技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 16
·9029-9038
·
IF 11.9
Yuxuan Li,Jing Yang,Xingzhao Zhang,Ximing Cui,Qinmin Pan
Solid polymer electrolytes (SPEs) have attracted growing attention because of their good processability and nonflammability. However, their applications in solid-state batteries are restricted by their limited ionic mobility in the electrolyte bulk and at electrode/electrolyte interfaces. Herein, this issue can be effectively addressed by using a composite polymer electrolyte (CPE) consisting of a polyethylene (PE) separator with polyethylene glycol (PEG) brushes and SN-based electrolyte. The presence of PEG brushes effectively expedites Li+ diffusion but hinders TFSI− migration, which endows the PE-PEG CPE with an improved diffusion coefficient (DLi+, 2.50 × 10−13 m2 s−1) and a high Li+ transference number (tLi+, 0.69). Importantly, the PEG brushes act as “Li+ bridges” to allow Li+ to migrate through various interconnected interfaces in the whole battery. The solid-state LiFePO4‖Li batteries with PE-PEG CPE present excellent cycling stability over 1000 cycles at a high rate (3C). Pouch cells using the prepared CPE exhibit high specific capacity at 1C and superior safety. Our study offers an alternative solution toward the fabrication of SPEs with high Li+ transportability, which have potential application in high-energy-density solid-state batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 10
·2369-2379
·
IF 3.903
Zhang WenJing,Li SenLin,Zhang YuRong,Wang XingHui,Liu JingDong,Zheng YuanHui
The practical applications of solid-state electrolytes in lithium-ion batteries (LIBs) are hindered by their low ionic conductivity and high interfacial resistance. Herein, an ethoxylated trimethylolpropane triacrylate based quasi-solid-state electrolyte (ETPTA-QSSE) with a three-dimensional (3D) network is prepared by a one-step in-situ photopolymerization method. The 3D network is designed to overcome the contradiction between the plasticizer-related ionic conductivity and the thickness-dependent mechanical property of quasi-solid-state electrolytes. The ETPTA-QSSE achieves superb room-temperature ionic conductivity up to 4.55×10 −3 S cm −1 , a high lithium ion transference number of 0.57, along with a wide electrochemical window of 5.3 V ( vs. Li + /Li), which outperforms most ever of the reported solid-state electrolytes. Owing to the robust network structure and the cathode-electrolyte integrated electrode design, Li metal symmetrical cells show reduced interface resistance and reinforced electrode/ electrolyte interface stability. When applying the ETPTA-QSSE in LiFePO 4 ∥Li cells, the quasi-solid-state cell demonstrates an enhanced initial discharge capacity (155.5 mAh g −1 at 0.2 C) accompanied by a high average Coulombic efficiency of greater than 99.3%, offering capacity retention of 92% after 200 cycles. Accordingly, this work sheds light on the strategy of enhancing ionic conductivity and reducing interfacial resistance of quasi-solid-state electrolytes, which is promising for high-voltage LIBs.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）