CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Linlin Hu,Xudong Zhang,Bing Li,Mihan Jin,Xiaohui Shen,Zongwu Luo,Zhanyuan Tian,Lizhi Yuan,Junkai Deng,Zhengfei Dai,Jiangxuan Song
Although silicon has the highest theoretical capacity among the existing anode materials, its practical application is highly hindered by huge interface stress arising from large volume change upon cycling. Herein, an efficient energy-dissipation engineering was harnessed on high-capacity silicon anodes through a synergized “static” (chemically crosslinking) and “dynamic” (physically crosslinking) binder. In this dual network, the disassociation of non-covalent hydrogen bonds greatly facilitates the dispersion and release of unfavorable stress, while the permanent chemical bonding network enables a deformable network to sustain the electrode structure. Such a strategy effectively avoids both materials and electrodes deterioration and promises a better Si-based anode: a high areal capacity of 2 mAh cm −2 with capacity retention of 91.3% after 200 cycles. Meanwhile, the energy-dissipation mechanism was further clarified by temperature-dependent FTIR and finite element simulations.
研究领域:
材料科学
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电化学
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锂离子电池
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yang Gao,Xiaotao Qiu,Xiuli Wang,Aiqun Gu,Li Zhang,Xianchun Chen,Junfeng Li,Zili Yu
Silicon (Si) anodes display high specific capacity but mostly suffer from poor cycling ability owing to their dramatic volume expansion during the discharge/charge process. An effort was devoted to developing new polymeric binders that could effectively mitigate the capacity fading of Si anodes. Herein, aqueous binders of chitosan-g-poly(acrylic acid) copolymer (CS–PAA) and its sodium salt (CS–PAANa) have been synthesized and applied as the functional binders for the stabilization of Si anodes in lithium-ion batteries. The structure and properties of Si anodes based on CS–PAA and CS–PAANa were comparatively characterized by using poly(vinylidene fluoride), chitosan, and poly(acrylic acid) as reference binders. Unlike conventional 1D structural binders, the CS–PAA and CS–PAANa form a cross-linked (3D) network during curing, which maintains mechanical integrity to mitigate Si nanoparticle pulverization effectively. Moreover, the abundant polar groups including carboxylic acid (−COOH) and carboxylate (−COO–) in the two binders could react with both Si nanoparticles and copper (Cu) current collector to offer robust adhesion, significantly improving electrode integrity after the repeated delithiation/lithiation cycles. Benefitting from the structural advantages, the Si/CS–PAA and Si/CS–PAANa electrodes deliver stable cycling performances of 1243 and 1608 mA h/g at 420 mA/g after 100 cycles.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Engineering
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2022
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IF 12.834
Xianqing Zeng,Donglin Han,Zeheng Li,Hongxun Wang,Gu Wu,Yong Deng,Kai Liu,Li Xie,Chengdu Liang,Min Ling,Yuchuan Huang
Practical application of a Si anode in a high-energy-density battery cannot be achieved due to the huge volume expansion of these anodes. Researchers have focused on binders of the anode to restrict volume expansion in order to address this issue, as the hydrogen bonds and mechanical properties of binders can be used to enhance adhesion and accommodate the volume changes of a Si anode. Herein, we comprehensively consider binders’ hydrogen bonds, mechanical properties, stability, and compatibility with the electrolyte solution, and design an ether-/ester-/fluorine-rich composite polymer, named P(TFEMA- co -IBVE). The proposed binder formula possesses outstanding stability, adhesion, and mechanical strength; moreover, it can accommodate the dramatic volume changes of a Si electrode and exhibits excellent electrochemical performance, achieving a high areal capacity of about 5.4 mA∙h∙cm −2 . This novel polymer design may be applied to other electrode materials in the next generation of lithium-ion batteries.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2021
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IF 6.901
Ting-Ting Su,Wen-Feng Ren,Ke Wang,Jiang-Meng Yuan,Chang-You Shao,Ji-Liang Ma,Xiao-Hong Chen,Ling-Ping Xiao,Run-Cang Sun
The optimization of polymeric binders has been considered as an effective strategy to accommodate the huge volume change of Si anodes during lithiation and delithiation processes. In this work, three dimensional polymeric binders (CMC/TU) with multiple hydrogen bonds were designed and fabricated through the copolymerization reaction between carboxymethylcellulose sodium (CMC) and thiourea (TU), which possess bifunctional effects on Cu current collectors and Si active materials. On the one hand, similar to the interaction mechanism at rubber-metal boundary in tire industry, the formation of dendritic Cu x S layers results in physical interlocked forces to strengthen the binding forces of CMC/TU binders with Cu current collectors. On the other hand, the generation of hydrogen bonds between polymeric binders and Si oxide layers can enhance the binding forces of CMC/TU binders with Si active materials and stabilize the electrode/electrolyte interface. When served as binders to Si microparticles (1–5 μm), they exhibited initial coulomb efficiency of 89.9% and reached 1059 mAh g −1 after 150 cycles, which results from the bifunctional roles of CMC/TU binders for maintaining electrode integrity during the discharge and charge processes. The developed synthetic method provides a strategy to enhance the electrochemical properties of Si-based materials, and can be widely applied to other electrode materials.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
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2020
·Vol. 217
·期 8
·1900806
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IF 1.759
Jingbo Li,Yu Liu,Fang Xu,Junping Hu,Nan Chen,Guoping Du,Changshuang Jiang
As a 2D material, Ti 3 C 2 (MXene) has been recently used as electrodes for electrochemical capacitors. Herein, a two-step procedure is used to obtain a highly opened layer structure for Ti 3 C 2 , which differs from the methods used in the literature for synthesizing exfoliated MXene. First, the mild NH 4 HF 2 etching agent is used to prepare the regular Ti 3 C 2 MXene. Second, KOH is added into the obtained solution for K + to intercalate the MXene. The K + intercalation is found to greatly increase the (002) crystal planar spacing of the Ti 3 C 2 from 10.8 to 12.4 Å. More importantly, this K + -intercalated MXene exhibits a highly opened layer structure, whereas the regular MXene only has a partially opened layer structure. Consequently, the former is expected to allow much more active sites exposed to liquid electrolyte, and also facilitates remarkably higher ion and electron transport efficiency. To investigate their electrochemical capacitance properties, the regular and K + -intercalated Ti 3 C 2 MXenes are used to fabricate binder-free electrodes on nickel foams by an electrophoretic deposition method. The K + -intercalated MXene-based electrode is found to have twice higher specific capacitance than the regular MXene. Furthermore, the K + -intercalated Ti 3 C 2 MXene-based electrode exhibits an excellent cyclic stability.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 41
·期 1
·95-107
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IF 3.815
Xie Zhen-Hua,Huang Zi-Xin,Zhang Ze-Ping,Rong Min-Zhi,Zhang Ming-Qiu
To construct structurally stable sulfur cathode of Li-S battery with improved cycling performance, poly(acrylic acid) (PAA) crosslinked by cationic hydroxypropyl polyrotaxane (HPRN + ) via dynamically reversible boronic ester bonds is synthesized and serves as the cathode binder. The smart polymer networks offer multifunction including buffering the volume change of the cathode during charge/discharge through the pulley effect of polyrotaxanes (PR), suppressing the shuttle effect by adsorption of polysulfide using the plentiful carboxyl, hydroxyl and quaternary ammonium cationic groups, and self-healing the micro-damages to ensure stable conduction pathways of the electrode. As a result, the Li-S batteries based on this novel multifunctional binder and simple commercial sulfur/carbon composites cathode exhibit excellent specific capacity and cycling stability. In particular, the specific capacity decay per cycle of the cell is only 0.064% along with high Coulombic efficiency after 550 cycles at 1.0 C, which is superior to most of the reported binders. Even under high sulfur loading, moreover, the cathode can deliver superior areal capacity and cycling stability. This proposed binder provides a new way for the design of high-stability sulfur cathodes.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2023
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IF 3.7
Jun Shen,Haoli Wang,Yueni Mei,Guangyu Cheng,Renxin Wang,Yingying Hu,Ruilin Wang,Yiyang Mao,Huihui Zhang,Qiang Wu,Baofeng Wang
A binder plays an essential role in preserving the mechanical stability of electrodes and in enhancing the cycle life of Si anodes. Nevertheless, the typical binders normally are not effective enough to relieve the unavoidable volume expansion of Si during cycling. Herein, to make full use of the polar functional groups on the polymer backbone, the citric acid-grafted poly(acrylic acid) (CA-g-PAA) composite binder is rationally designed and prepared by a simple graft modification. The CA molecule not only provides more reactive groups but also connects with PAA to form a multidimensional branched structure. Due to the interaction of CA and PAA, the proposed binder (CA-g-PAA) demonstrates enhanced adhesion strength. Thus, the CA-g-PAA/Si electrode retains a high discharge specific capacity of 2482.3 mAh g–1 after 300 cycles at 840 mA g–1 and exhibits a better structural integrity. This study highlights the synergistic interaction of CA and PAA with Si particles and offers a simple path for the design of optimized binders.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jiaqi Jiao,Han Lu,Conghua Yi,Dongjie Yang,Xuezhi Zeng,Jinxin Lin,Hongqiang Li
Binders are crucial for maintaining the integrity of an electrode and are confronted with the imperative for multifunctionality. Herein, we have developed and synthesized an entirely biomass-based water-soluble binder with outstanding adhesion, conductivity, flowability, and dispersibility for the hard carbon (HC) anode. Specifically, MXene (Ti 3 C 2 T x ) reduces the amount of HC graphite domain imperfections, the cross-linked carboxymethyl chitosan (CCS) chain facilitates Na + movement, and the amphiphilic nature of lignosulfonate (LS) enhances the distribution of active material. As a result, the HC anode achieves an initial coulombic efficiency (ICE) of 88 % and high-capacity retention of 110 % after 100 cycles. This work promotes the progress of green energy in parallel with the promotion of the high-value utilization of biomass.
研究领域:
材料科学
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能源存储
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生物质利用
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2024
·
IF 4.2
Peicheng Mo,Jiarong Chen,Kai Li,Jun Zhang,Xiaoyi Pan,Chao Chen
The cBN, Zr, and Al powders were mixed to synthesize PcBN (polycrystalline cubic boron nitride) tool material under high-temperature, ultra-high-pressure conditions. X-ray diffraction and scanning electron microscopy were used to analyze the phase composition and microstructure of the tool material. The mechanical properties and microstructural trends of the tool material at various temperatures were investigated. Research indicates the formation of new phases in the PcBN material following high-temperature and ultra-high-pressure sintering. However, there is no significant difference in the types of formed new phases, all of which consist of BN, ZrB 2 , ZrN, and AlN. The sintering density of the tool material was higher at 1500 °C and 1600 °C, and the mechanical properties improved with increasing sintering temperature . The highest number of tool processing parts made of PcBN tool material synthesized at 1600 °C is 232.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
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
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Wu Yang,Wenhao Liu,Mengze Zheng,Cong Zhu,Tianqi Li,Yunjun Luo
A polyol bonding agent (BA) was utilized to enhance the mechanical properties of propellant with low aluminum content. Through scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) analysis, it was discovered that BA can physically bond to the surfaces of ammonium perchlorate (AP) and hexogen (RDX). The results of mechanical testing showed that the use of BA can significantly improve the mechanical properties of propellants. Specifically, as the amount of BA increases, the maximum tensile strength ( σ m ) of the propellant also increases, the fracture elongation ( ε b ) initially increases and then decreases, the “dewetting ratio” continuously decreases, and the creep resistance of the propellant also increases. At a BA content of 0.2%, the σ m of the propellant reaches 0.6 MPa, the ε b exceeds 50%, and the “dewetting ratio” is less than 1.1.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Yuhua Heng,Yiwei Mao,Kunhao Feng,Jianan Zheng,Yingmi Xie,Qingsong Wei
Binder jetting (BJ) possesses considerable potential in forming complex tungsten heavy alloy components. Nonetheless, it is also confronted with challenges such as low green density. Achieving densification typically requires stringent sintering conditions, such as high temperatures or extended durations, which often result in coarse grains and diminished performance in sintered components. This paper introduced a novel inorganic metal salt binder that could generate nanoparticles in situ among the substrate powders. Clearly, the nanoparticles (average size: 360 nm) generated in situ, occupied the interparticle voids between the substrate powders after pretreatment, thereby enhancing the green and pretreated density and reducing the sintering temperature. The pretreated density binder jetted with the novel binder increased by 7.76% compared to that with the commercial binder. Furthermore, surface quality and compressive strength were also improved. The sintered samples could achieve densification at a lower sintering temperature (1500 °C). The increase of capillary force and the elevated solubility of nanoparticles were the primary reasons for densification, which facilitated pore filling and dissolution-reprecipitation during liquid phase sintering, respectively. The ultimate tensile strength, yield strength, and elongation of the sintered samples were 871.06 ± 14.23 MPa, 606.71 ± 9.84 MPa, and 11.00 ± 0.28%, which were 9.50%, 4.30%, and 5.49% higher than those of the sintered samples binder jetted with the commercial binder, respectively. The utilization of inorganic metal salt binders provides a novel approach to the densification and enhancement of the mechanical properties of BJ metallic materials.
研究领域:
材料科学
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增材制造
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）