Materials Today Communications
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2025
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IF 4.5
Rui Li,Qin Xia Wu,Bin Hong Liu,Zhou Peng Li
We introduce a unique self-adaptive and dual-conductive binding network composed of (1) adjustable adhesion molecule of ion-conductive cyclodextrin (CD) and (2) rigid network consisting of electron-conductive polypyrrole (PPy) and ion-conductive lithium carboxymethyl cellulose (LCMC) for electrode formation. Such a binding network of CD@PPy:LCMC is constructed by association of LCMC with inclusion complex of CD@PPy after extending PPy by polymerization of pyrrole which is released from pyrrole micelles with the CD@PPy as the wall material. CD molecules can rotate around and slide along the PPy chain in the CD@PPy:LCMC, dispersing stress arising from volume expansion of Si after lithiation. The abundant carboxyl groups in CMC and hydroxyl groups in glucopyranose unit of CD and CMC provide high absorption capability to fix Si nano-particles. The Si anode with the CD@PPy:LCMC presents small polarization, high capacity, and excellent cycleability. The initial capacity as high as 3881 mAh g −1 , the rate capacity of 1208 mAh g −1 at 6 C (1 C=4200 mAh g −1 ), and the excellent capacity retention of 2200 mAh g −1 after 200 deep charge-discharge cycles with cyclic decay of 0.12 % per cycle have been achieved.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 10
·2100839
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IF 14.188
Shiming Chen,Zhibo Song,Yuchen Ji,Kai Yang,Jianjun Fang,Lu Wang,Zijian Wang,Yan Zhao,Yunlong Zhao,Luyi Yang,Feng Pan
Exhibiting high specific energy and low cost, lithium–sulfur batteries are considered promising candidates for the next-generation battery. However, its wide applications are limited by the insulating nature of the sulfur, dissolution of polysulfide species, and large volume change of the sulfur cathode. In this work, a conductive binder, crosslinked polyfluorene (C-PF) is synthesized and employed in Li–S batteries to enhance the overall electrochemical performance from the following three aspects: 1) possessing high electronic conductivity, C-PF facilitates lowered areal resistance for the sulfur electrode and leads to an improved rate capability; 2) owing to the cross-linked polymer structure, favorable mechanical properties of the electrode can be achieved, hence the well-preserved electrode integrity; 3) forming strong binding with various polysulfide species, C-PF manages to trap them from diffusing to the Li anode, which greatly improves the cycling stability of Li–S cells. Through designing a multifunctional binder to comprehensively enhance the Li–S cathode, this proposed approach could be broadly applied to fully harness the energy from S redox in addition to cathode material modifications.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
PubMed
高影响因子
Batteries-Basel
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2022
·Vol. 8
·期 6
·54
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IF 5.938
Zikai Li,Anru Guo,Dong Liu
The design of novel and high-performance binder systems is an efficient strategy to resolve the issues caused by huge volume changes of high-capacity anodes. Herein, we develop a novel water-soluble bifunctional binder composed of a conductive polythiophene polymer (PED) and high-adhesive polyacrylic acid (PAA) with abundant polar groups. Compared with conventional conductive additives, the flexible conductive polymer can solve the insufficient electrical contact between active materials and the conductive agent, thus providing the integral conductive network, which is extremely important for stable electrochemical performance. Additionally, the polar groups of this composite binder can form double H-bond interactions with the hydroxyl groups of SiO2layers onto the silicon surface, keeping an integral electrode structure, which can decrease the continuous formation of SEI films during the repeated cycles. Benefiting from these bifunctional advantages, the Si electrodes with the composite binder delivered a high reversible capacity of 2341 mAh g−1at 1260 mA g−1, good cycle stability with 88.8% retention of the initial reversible capacity over 100 cycles, and high-rate capacity (1150 mAh g−1at 4200 mA g−1). This work opens up a new venture to develop multifunctional binders to enable the stable operation of high-capacity anodes for high-energy batteries.Keywords:water-soluble polymer;conductive binder;bifunctional;silicon anode;Li-ion batteries
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yan Zhao,Luyi Yang,Yunxing Zuo,Zhibo Song,Fang Liu,Ke Li,Feng Pan
Employing conductive binders in silicon (Si) anode has been considered as a fundamental solution to the pulverization of Si particles. Therefore, it is still a great challenge to improve the charge transfer capability of the conductive binder. Herein, a copolymer (PFPQ-COONa) is synthesized, characterized, and electrochemically tested as conductive binder for Si anode. It is found that PFPQ-COONa exhibits not only excellent cycling stability, but also satisfactory rate performance with relatively high areal loading, which outperforms currently reported single-component conductive binders. The superior electrochemical performance can be attributed to the molecular-level contact between binder and Si particles and to the enhanced intrinsic conductivity of PFPQ-COONa at reductive potential. This method provides a fresh perspective to design and develop conductive binder for high-capacity battery anode.
研究领域:
材料科学
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电化学
·
电池技术
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2019
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IF 5.383
Qingqin Ye,Peitao Zheng,Xiaohu Ao,Dahua Yao,Zhiwen Lei,Yonghong Deng,Chaoyang Wang
Using conductive binders, instead of the traditional binders and conductive additives, is an effective way to increase the specific capacity and long cycle life of the silicon (Si) anode. However, the rigid conductive binders of Si anodes tend to form cracks during the repetitive huge volume changes of Si. Here, a novel n-type conductive binder, multi-block polymer of poly(1-pyrenemethyl methacrylate) and polybutadiene (PPy- b -PB) was designed. The polybutadiene (PB) rubber was incorporated into the conductive binder by combining condensation and reversible addition-fragmentation chain transfer polymerization. With high initial coulombic efficiency of 77.9%, the PPy- b -PB/Si anode possesses high reversible capacity (2274 mAh g −1 ) and capacity retention (87.1%) at the rate of 0.2 C (0.84 A g −1 ) after 200 cycles. The superior cyclic performance of the PPy- b -PB can be ascribed to the PB rubber, which enhanced the reversible deformation ability, flexibility, and adhesion length scale of the binder, without with a negligible change of the charge-transfer resistance for the anode. The original structure and the preparation method of the multi-block conductive binder provide a new way to manufacture multifunctional binders.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Bo Fan,Yuexin Fang,Bai Xue,Qixing Wu,Zhongkuan Luo,Xianghua Zhang,Laurent Calvez,Lilin Wu
Flexible solid-state batteries fabricated by printing techniques are promising integrated power supplies for miniaturized and customized electronic devices. While typically these batteries use polymer solid electrolytes, a flexible Li2S cathode with sulfide solid electrolyte is spray-printed in this work, by using solvated Li3PS4 nanoparticles as inorganic ion-conductive binder. This benefits from a novel low-temperature-sintering property of these nanoparticles, which can be pressure-free densified, along with the desolvation process, and thus bind the cathode at 250 °C. The battery can be stably charged and discharged for 300 cycles with no stacking pressure, and the capacity maintains at 840 mA h gLi2 S–1. We believe this low-temperature-sintering phenomenon of solid electrolyte nanoparticles will open a new path toward the application of sulfide solid electrolytes in printed solid-state batteries.
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
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenhui Geng,Xinmeng Hu,Qinhua Zhou,Yinhang Zhang,Bin He,Zhiliang Liu,Kuikui Xiao,Dong Cai,Shuo Yang,Huagui Nie,Zhi Yang
Silicon (Si) has been regarded as a candidate for high-energy-density lithium-ion batteries (LIBs) because of its excellent specific capacity. Binders, as an essential component in Si anodes, play a key role in enhancing the electrochemical performance of LIBs. In this study, a multifunctional binder named LP19 simultaneously possessing high electron conductivity, high Li-ion conductivity as well as ameliorative mechanical performances was synthesized by assembling the lithiated PAA (LiPAA) and highly conductive PEDOT:PSS molecules. The lithiation treatment of PAA is conducive to the transport of lithium ions, while the double conductive network constructed by conductive PEDOT:PSS and Super P guarantees the stable electric connectivity during lithiation and delithiation processes. Moreover, the optimization of the internal configuration of the molecules realizes the structural and cycling stability of the Si anode. As a consequence, the Si anode utilizing this binary and multifunctional conductive binder demonstrated pronounced cycling stability (2165 mAh g −1 after 200 cycles) and rate performance (1750 mAh g −1 at 8.0 A g −1 ). This work provided a novel design strategy of polymeric binders to promote progress toward high-performance LIBs.
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
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Xu Su,Han Fang,Hao Yang,Fangfang Zou,Gang Li,Lian Wang,Hongxin Liao,Wei Guan,Xuebu Hu
Polysaccharides can be potential binders for lithium-ion batteries due to their strong adhesion through numerous hydroxyl groups . As a novel waterborne lithiated polysaccharide derivative, cellulose sulfate lithium (CSL) is successfully synthesized and used as the binder for LiFePO 4 (LFP) cathode. The chemical structure of CSL is verified by FTIR-ATR, XRD, C 13 -NMR, GPC , EA , ICP and TGA . Compared to LFP cathode using polyvinylidene difluoride binder, electrochemical measurements show that the LFP cathode using CSL (LFP-CSL) has lower polarization and better rate performance owing to higher lithium-ion conductivity of CSL. The result of morphological analysis indicates that CSL binder can maintain an integrated LFP cathode structure during hundreds of cycles. As a result, the LFP-CSL cathode exhibits a discharge capacity of 133.4 mAh g −1 and maintains remarkable cycle stability with retention of 93.1 % after 300 cycles at 1C. These findings provide novel insights into the rational design of the binders for the LFP cathode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）