MACROMOLECULAR MATERIALS AND ENGINEERING
·
2018
·Vol. 304
·期 1
·1800477
·
IF 2.69
Ziqiang Xu,Wenlei Li,Zhi Chen,Dongxia Wang,Tingting Feng,Hanna Potapenko,Mengqiang Wu
A novel porous membrane of chemically modified polyvinyl butyral (mPVB), with improved thermal properties and chemical stability for lithium ion battery applications, is successfully synthesized by utilizing the chain extension reaction of the OH units from PVB. The porous mPVB membranes are obtained via the tape casting and phase inversion method. The corresponding gel polymer electrolyte (GPE) is achieved by immersing the as-prepared membranes in the liquid electrolyte. The electrochemical performances of the GPE show that the mPVB membranes have the features of good uniformity, high porosity ( ≈ 90%), great thermal stability, and high mechanical strength. Moreover, the GPE exhibits good chemical stability, a wide electrochemical window, as well as high ionic conductivity ( ≈ 1.21 × 10 −3 S cm −1 ). A test of a Li/GPE/LiFePO 4 battery cell shows a capacity of 147.7 mAh g −1 and excellent cycling stability, demonstrating the great potential of the mPVB-based GPE for lithium ion battery applications.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dongdong Li,Junzhi Li,Mingrui Wang,Guangshe Li,Gennadi Milinevsky,Lili Wang,Wei Han
Low energy density remains a major obstacle limiting the development and application of flexible sodium-ion batteries (SIB). Thus, this study aimed to eliminate non-active materials in electrodes, which can be a feasible way to increase the energy density of SIBs. An anode made up of flexible, free-standing SnS 2 /Sb 2 S 3 /Ti 3 C 2 T x composite carbon nanofibers (SnSbS/T-M@CNF), a Na 3 V 2 (PO 4 ) 3 composite carbon nanofibers cathode (NVP@CNF), and composite gel polymer fiber electrolytes (CGPFE) were successfully synthesized through electrospinning. MXene nanosheets improved the electrical conductivity of the SnSbS/T-M@CNF electrode and absorbed sodium sulfide, inhibiting the loss of S during the reaction. Consequently, the SnSbS/T-M@CNF free-standing electrode could be stably cycled for 1000 cycles at a current density of 1 A g −1 and maintained a reversible capacity of 397.6 mAh g −1 . Further, the NVP@CNF cathode and CGPFE quasi-solid electrolyte half-cells had an excellent cycle stability and rate performance. The flexible, free-standing SnSbS/T-M@CNF anode and NVP@CNF cathode were assembled into quasi-solid-state full cells to test their application value. The SnSbS/T-M@CNF||CGPFE||NVP@CNF full cell had a very low resistance and could easily power a 3 V LED chest lamp. After 500 cycles, it maintained a discharge capacity of 153 mAh g −1 under a current density of 0.5 A g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
柔性电子器件
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 65
·52382-52387
·
IF 3.84
Minxia Li,Xiaowei Wang,Yanfang Wang,Bingwei Chen,Yuping Wu,Rudolf Holze
A new composite gel polymer electrolyte of nonwoven fabric (NWF) and methyl cellulose (MC) with good mechanical properties and outstanding thermal and electrochemical stability is prepared by a simple and green casting process followed by absorbing liquid electrolyte. Its characteristics are investigated by scanning electron microscopy, FT-IR, thermogravimetric analysis (TGA). Due to the synergistic action between MC matrix and the NWF framework, the composite gel polymer electrolyte achieves higher ionic conductivity (0.29 mS cm−1) at ambient temperature and larger lithium ion transference number (0.34) than those for the conventional Celgard 2730 separator (0.21 mS cm−1 and 0.27, respectively) in 1 mol L−1 LiPF6 electrolyte, and their activation energies are similar. In addition, the composite membrane shows better mechanical strength than the pure MC membrane. The evaporation rate of the liquid electrolyte at elevated temperature is much decreased. The assembled Li//LiFePO4 cell using this composite gel membrane exhibits better cycling retention and higher discharge capacity than those based on Celgard 2730 separator and pure MC gel membrane. These fascinating characteristics suggest that this unique composite gel polymer electrolyte can be used for lithium ion batteries with good performance and low cost.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子材料
·
电池技术
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 34
·1801798
·
IF 9.598
Xiaohong Zou,Qian Lu,Yijun Zhong,Kaiming Liao,Wei Zhou,Zongping Shao
Gel-polymer electrolytes are considered as a promising candidate for replacing the liquid electrolytes to address the safety concerns in Li–O 2 /air batteries. In this work, by taking advantage of the hydrogen bond between thermoplastic polyurethane and aerogel SiO 2 in gel polymer, a highly crosslinked quasi-solid electrolyte (FST-GPE) with multifeatures of high ionic conductivity, high mechanical flexibility, favorable flame resistance, and excellent Li dendrite impermeability is developed. The resulting gel-polymer Li–O 2 /air batteries possess high reaction kinetics and stabilities due to the unique electrode–electrolyte interface and fast O 2 diffusion in cathode, which can achieve up to 250 discharge–charge cycles (over 1000 h) in oxygen gas. Under ambient air atmosphere, excellent performances are observed for coin-type cells over 20 days and for prototype cells working under extreme bending conditions. Moreover, the FST-GPE electrolyte also exhibits durability to protect against fire, dendritic Li, and H 2 O attack, demonstrating great potential for the design of practical Li–O 2 /air batteries.
研究领域:
电化学能源
·
材料科学
·
纳米复合材料
·
先进电池技术
·
固态离子学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jian Wang,Zhiyu Xun,Chenyang Zhao,Yang Liu,Jiyou Gu,Pengfei Huo
Soy protein isolate (SPI) is one of the most abundant plant proteins in nature. Enormous studies have been carried out on SPI-based materials, however, the application for energy storage devices is still limited due to its fiddly film forming process and lack of electrochemical performance. Herein, we presented a SPI-based polymer electrolyte by grafting modification with the hydrophilic functional monomer acrylamide (AM). The optimized gel polymer electrolyte (GPE) exhibited an excellent ionic conductivity up to 5.10 mS cm −1 , which was greatly higher than gel polymer electrolyte based on original pure SPI (1.84 mS cm −1 ). More significantly, supercapacitors constructed by grafting-modified SPI delivered a specific capacitance of 141.74 F g −1 at 1.0 A g −1 and exhibited high capacitance retention of 95% after 8000 charge−discharge cycles. Beyond that, redox-active polymer electrolyte based on grafting-modified SPI combining with KI enormously improved the energy density of supercapacitor up to 27.52 Wh kg −1 at a current density of 0.5 A g −1 . This work provided a novel and facile strategy to obtain a high-performance SPI-based polymer electrolyte and laid an experimental foundation for the high-value application of SPI in the field of energy storage devices.
研究领域:
材料科学
·
高分子化学
·
能源存储
·
生物基材料
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yang Bai,Yanbiao Zhao,Weidong Li,Linghui Meng,Yongping Bai,Guorong Chen
The developing sulfide solid electrolyte is a promising way to overcome shuttle effect of polysulfide in the traditional liquid Li-S battery. However, an air stable sulfide solid electrolyte and competitive solid–solid interface structure must be constructed firstly. Herein, we have designed an organic–inorganic multi-scale composite electrolytes to overcome the interfacial issues of solid state Li-S batteries (SSLSBs). The organic–inorganic composite electrolyte consists of a gel polymer electrolyte (GPE) and an oxygen doped inorganic sulfide solid electrolyte. The O doped sulfide solid electrolyte improves its chemical stability and suppresses the lithium dendrites. A thin GPE film protects the crystal structural stability during cycles and greatly enhances the performance of O doped sulfide solid electrolyte due to the GPE not only constructs soft interface contact between S cathode and solid electrolyte, but also builds lithium ion transport paths by ionic liquid between them. Those SSLSBs display a very good cycling performance with the specific capacity of 1023 mAh/g after 50 cycles at 60 °C and 541 mAh/g after 150 cycles at 30 °C under same rate of 0.1 C. This study demonstrates that the development of advanced solid-state Li-S battery needs to fully integrate a number of technical advantages.
研究领域:
电化学
·
材料科学
·
固态电池
·
能源存储
·
界面化学
·
纳米材料
·
电极材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Nan Lu,Xi Zhang,Ruiqi Na,Wendi Ma,Chongyang Zhang,Yuchao Luo,Yongfeng Mu,Shuling Zhang,Guibin Wang
The synthesis of a nanocomposite gel polymer electrolytes (NGPEs) using Li + -functionalized SPEEK (SPEEK(Li)) nanofiber membrane as a matrix, cross-linked PVA as a gelled agent and LiClO 4 as an electrolytic salt for electric double layer capacitors (EDLCs) were reported in this work. Compared with conventional PVA based gel electrolyte, the “SO 3 − Li + ” functional groups and the pores structure of the SPEEK(Li) nanofiber membrane improves the ionic conductivity as well as mechanical stability , which made the prepared NGPEs exhibited a high ionic conductivity of 8.9 × 10 −3 S cm −1 at ambient temperature and a large voltage stability window range from 0 to 2.0 V. The fabricated symmetric EDLCs showed a specific capacitance of 146.96 F g −1 at a current density of 0.5 A g −1 , with a maximum energy density of 18.26 W h kg −1 . Meanwhile, the EDLCs showed outstanding cyclical stability of 98% specific capacitance retention after 3000 cycles GCD testing, all of these results indicated that the NGPEs should be appropriate to EDLCs and next-generation energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米技术
·
固体电解质
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）