SOLID STATE IONICS
·
2022
·
IF 3.699
Tayfun Kocak,Xiadong Qi,Xiaogang Zhang
The extended cyclability of LiNi 0.5 Mn 1.5 O 4 (LNMO) electrodes featuring different water-based binders is here reported. LNMO electrodes with guar gum (GG) binders show a relatively stable cycle performance at 0 °C and room temperature. However, water-based binders exhibit higher capacity fade than those with polyvinylidene fluoride (PVdF) binder at 50 °C. Although PVdF binder has a lower adhesion force than CMC and GG; PVdF-based electrodes exhibit better capacity retention than those with water-based binders at 50 °C over 1000 cycles. Finally, operando Differential Electrochemical Mass Spectrometry (DEMS) experiments were carried out to analyze the evolution of volatile decomposition products formed over cycling at 1C and 30 °C of CMC-, GG- and PVdF-based LNMO electrodes. CO 2 and H 2 gas evolutions increase remarkably at both high temperatures and high potentials, i.e., ~ 4.7 V.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
电极材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Erying Zhao,Zonglei Guo,Jie Liu,Qian Zhang,Ziyang Guo,Yu Yang,Hui Wang,Lei Wang
High-energy-density Li-ion batteries are urgently demanded in the development of electric vehicles and smart power grids. Owing to the high theoretical capacity, silicon (Si) has been considered as one of the most promising anode materials for next-generation Li-ion batteries. However, Si anode materials undergo huge volume change during charge and discharge processes, which severely impairs the cycle stability of Si anodes. Herein, to stabilize the Si anodes, a low-cost and eco-friendly network binder coupling hardness with softness was designed through in-situ cross-linking of guar gum (GG) and carboxylated acrylonitrile-butadiene rubber (XNBR). The rigid and high-viscosity GG functions as a skeleton to withstand the expansion of Si active materials, and the elastic XNBR can effectively buffer the residual stress. The mass ratio of GG and XNBR was systematically studied to achieve superior cycling stability of Si anodes. Especially, the Si@X4G6 electrode shows excellent cycle stability, remaining a capacity of 1929 mAh g − 1 at 1000 mA g − 1 after 100 cycles. Interestingly, such an effective strategy not only works well in Si anodes but also does well in Si/C anodes and LiFePO 4 cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米材料
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·Vol. 50
·期 7
·100101
·
IF 1.193
Ranehipura Dewage Lahiru SANDARUWAN,Bo-Yu WANG,Suwanda Arachchige Don Rumesh MADHUSANKA,Shun-Chao MA,Hong-Yu WANG
Transition to aqueous electrode fabrication of lithium ion batteries (LIBs) with green binder is certainly profitable and imperative in terms of economic benefit and environmental wellness. However, aqueous processing of cathode in LIB, especially the ternary LiNi x Co y Mn z O 2 (NCM), is still problematic and novel water-soluble binder should be developed to boost the electrochemical performances of cathode. In this regard, commercially available white latex (WL), cooperating with CMC (carboxymethyl cellulose), is employed as water-processable binder mixture for manufacturing NCM cathode. Interestingly, the prepared NCM cathode assisted by WL/CMC mixture exhibits improved electrochemical performances including better initial reversible capacity of 161.7 mAh g −1 at 0.5 C current density, long-term cyclability with a reversible capacity of 155 mAh g −1 along with high-capacity retention of around 96% after cycling 200 times, and even excellent rate capability, which are superior to those of the conventional counterpart base on polyvinylidene fluoride (PVdF). Moreover, the NCM|graphite full cell, which is absolutely based on this novel WL binder, also demonstrates the outstanding electrochemical behaviors.
研究领域:
电化学
·
能源材料
·
锂电池技术
·
高分子材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lili Chai,Qunting Qu,Longfei Zhang,Ming Shen,Li Zhang,Honghe Zheng
Chitosan was applied as the electrode binder material for a spherical graphite anode in lithium-ion batteries. Compared to using poly (vinylidene fluoride) (PVDF) binder, the graphite anode using chitosan exhibited enhanced electrochemical performances in terms of the first Columbic efficiency, rate capability and cycling behavior. With similar specific capacity, the first Columbic efficiency of the chitosan-based anode is 95.4% compared to 89.3% of the PVDF-based anode. After 200 charge–discharge cycles at 0.5 C , the capacity retention of the chitosan-based electrode showed to be significantly higher than that of the PVDF-based electrode. Electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) measurements were carried out to investigate the formation and evolution of the solid electrolyte interphase (SEI) formed on the graphite electrodes. The results show that a thin, homogenous and stable SEI layer is formed on the graphite electrode surface with chitosan binder compared with that using the conventional PVDF binder
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
纳米材料
·
界面化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 9
·4604-4609
·
IF 2.936
Lei Lü,Hongming Lou,Yinglin Xiao,Guangzhao Zhang,Chaoyang Wang,Yonghong Deng
Triblock copolymer polydopamine-polyacrylic-polyoxyethylene (PDA-PAA-PEO) with excellent performance as a binder for silicon anodes was synthesized. Its structure was confirmed by 1H-NMR, FTIR and UV-vis spectroscopy. Results of electrochemical measurements indicated that a silicon anode based on PDA-PAA-PEO binder exhibited excellent cycle performance with a reversible capacity of 1597 mA h g−1 after 200 cycles at a current density of 0.5 C, much better than that of an electrode based on a polyvinylidene-fluoride binder. Improvement of the cycle performance and reversible capacity for silicon anodes could be attributed to the strong adhesive and high ion conductivity of PDA-PAA-PEO.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Naseem Akhtar,Hongyuan Shao,Fei Ai,Yuepeng Guan,Qifan Peng,Hao Zhang,Weikun Wang,Anbang Wang,Bingyin Jiang,Yaqin Huang
Lithium-sulfur (Li-S) batteries with high specific capacity are expected to be a new generation of energy storage devices. However, the shuttle effect of lithium polysulfide makes it difficult to commercialize stable Li-S batteries. In this work, we designed a gelatin-polyethylenimine composite (GPC) as functional binder for Li-S batteries to improve the stability of electrode during discharge-charge process. GPC binder combines the dispersion and adhesion ability of gelatin, which keeps cathode homogeneous and stable during electrochemical reaction , and adsorption capability of PEI for polysulfide , which suppresses the “shuttling effect”. The result shows that GPC used as a binder remarkably enhanced cyclic performance of Li-S battery with good capacity retention of about 100% at current density of 1C (sulfur loading 1.5 mg cm −2 ) after 100 cycles. We believe that GPC would be a promising binder for highly stable Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米复合材料
✓ 已验证
DOI
高影响因子
MethodsX
·
2019
·
IF 0
Chengyuan Liu,Zhiwei Liu,Hongkun Niu,Cong Wang,Zhaowen Wang,Bingliang Gao,Jingjing Liu,Mark Taylor
We provide a method for preparation of binder-free cathode for rechargeable aluminum-ion batteries (AIBs). Ultrasonicated natural graphite (u-NG) flakes in N-methylpyrrolidone (NMP) is drop-casted to a carbon fiber cloth (CFC) to obtain binder-free u-GF@CFC cathode for AIBs. We also provide an in-situ Raman spectral technology and the corresponding in-situ Raman cell to determine the mechanism of intercalation/deintercalation reactions of the chloroaluminate ions at cathode of AIBs. The in-situ Raman spectra are recorded using a Raman spectrometer combined with a potentiostat/galvanostat model electrochemical workstation. • A simple preparation method of a binder-free u-GF@CFC cathode is suggested. • The u-GF@CFC cathode is obtained by drop-casting ultrasonicated graphite flakes on the surface and internal gaps of the carbon fiber cloth. • The method includes the in-situ Raman spectral technology and the corresponding in-situ Raman cell.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
原位表征
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 17
·12747-12754
·
IF 2.019
Huang Feng,Yan Aihua,Sui Yanwei,Wei Fuxiang,Qi Jiqiu,Meng Qingkun,He Yezeng
Ni 3 S 4 @MoS 2 nanosheets grown on the carbon fiber paper (Ni 3 S 4 @MoS 2 /CFP) were successfully prepared via a facile one-step hydrothermal technique. Serving as a supercapacitor electrode, the obtaining Ni 3 S 4 @MoS 2 /CFP exhibits a remarkable specific capacitance of 1296 F/g, high rate capability of 57.8%, and excellent cycling stability of 96.2% retention after 5000 cycles. The superior electrochemical properties of Ni 3 S 4 @MoS 2 /CFP nanocomposite is attributed to the synergistic effects of the layeredNi 3 S 4 , MoS 2 and the conductive CFP.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
复合材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Heli Yu,Mingzhu Bi,Cuijuan Zhang,Tianjie Zhang,Xiaoning Zhang,Hongtao Liu,Jianli Mi,Xiangqian Shen,Shanshan Yao
Construction of high sulfur loading electrode is one of the effective ways to achieve high specific energy density lithium/sulfur batteries. Therefore, the optimization of polymeric binders has been considered as effective strategy to improve the volume changes of sulfur electrodes during charge/discharge processes. In this work, an effective route for the preparation of three dimensional polymeric binder (PAA-PANI) via multiple hydrogen bonds was developed and fabricated through in situ polymerization between polyacrylic acid (PAA) and polyaniline (PANI), which possess bifunctional effects on high sulfur loading cathodes in lithium/sulfur batteries. The carboxyl polar groups of PAA could effectively adsorb polysulfides and the conductive PANI enhance the electronic conductivity of the sulfur electrode. The three dimensional polymeric binder of PAA-PANI has enhanced the active material adhesion, mechanical properties and electronic conductivity, which decreased overpotential polarization, improved the lithium ions diffusion coefficient, and reduced the self-discharge. More importantly, the PAA-PANI functional binder could alleviate the expansion of high sulfur loading electrode. Taking advantages of PAA-PANI binder, the carbon nanotubes modified sulfur electrode (CNTs@S; sulfur content: 84.3 wt%) with PAA-PANI binder exhibits an initial discharge capacity of 906 mAh g –1 at 2.56 mA cm –2 (0.3 C) under a sulfur loading of 5.1 mg cm –2 . Even at higher current density of 8.54 mA cm –2 (1 C), the PAA-PANI binder electrode delivers a high capacity of 846 mAh g –1 . Moreover, with an extremely high areal sulfur loading of 17 mg cm –2 , the cathode shows an areal specific capacity of 16.7 mAh cm –2 .
研究领域:
电化学
·
能源材料
·
高能电池
·
功能高分子
·
界面化学
·
储能技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Murong Xi,Zhenjie Liu,Rui Sheng,Jiafeng Zhu,Yong Guo,Juan Ding,Xingchao Wang,Yue Zhang,Lei Wang,Zhipeng Sun,Wenjun Zhang,Jiulin Wang,Yudai Huang
Dissolutions of the polymer in the chaotropic salts follow Hofmeister effect, and the aggregate of salts and solvents shows new influence of the Hofmeister effect. Here, we reveal the aggregation of ion–solvent in chaotropic salt solution catalyzes the formation of the exposed Lewis acid-base center and realizes the dissolution of polyamide (PA) macromolecules. The relationship between Hofmeister effect, aggregate chemistry and Lewis acid-base chemistry is examined from new perspective. And then, a new solvent system and phase conversion process are designed for polyamides. Finally, the applications of PA in ZIBs as coating layer and binder are realized. As an electrode coating, it can effectively inhibit hydrogen evolution, corrosion and dendrite problems and improve the cycle life (cycle over 1500 h at 0.5 mA cm −2 ). As a binder, the active material adhesion on current collector, uniformity and wettability of the electrode are improved. The assembled pouch-cell with PANI cathode shows a capacity of 150 mAh g −1 after 120 cycles. This work reveals the secret of controlled phase transformation of polyamide in saline solution from a new perspective. And this phase conversion method is simpler, greener and more environmentally friendly, which greatly accelerates the application of polyamide in the field of membrane science and binder science.
研究领域:
高分子化学
·
电化学
·
材料科学
·
能源存储
·
膜科学
·
粘结剂科学
·
物理化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Minghao Sun,Haoxiang Zhong,Shuren Jiao,Hanqi Shao,Lingzhi Zhang
Carboxymethyl chitosan (C-CTS) was firstly reported as a water soluble binder for LiFePO 4 cathode in Li-ion batteries. The electrochemical performances of LiFePO 4 cathode with C-CTS binder was investigated and compared with the conventional water-soluble sodium carboxymethyl cellulose (CMC) and the commercial non-aqueous polyvinylidene difluoride (PVDF). LiFePO 4 cathode with C-CTS exhibited a comparable cycling performance, but better rate capability than that of CMC and PVDF, retaining 65% capacity of C/5 at 5 C rate as compared with 55.9% and 39.4% for CMC and PVDF, respectively. In addition, LiFePO 4 cathode with C-CTS exhibited excellent cycling performance at 60 °C, retaining 91.8%/62.1% capacity after 80 cycles at 1 C/10 C, respectively.
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
危险品化学品经营许可证（带存储）