CHEMICAL ENGINEERING JOURNAL
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2023
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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
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电化学
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材料科学
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能源存储
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膜科学
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粘结剂科学
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物理化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Mingshan Wang,Jun Zhang,Linzi Zhang,Jiaqi Li,Wenjie Wang,Zhenliang Yang,Lei Zhang,Yixian Wang,Junchen Chen,Yun Huang,David Mitlin,Xing Li
A new approach is employed to boost the electrochemical kinetics and stability of vanadium oxygen hydrate (VOH, V2O5·nH2O) employed for aqueous zinc-ion battery (ZIB) cathodes. The methodology is based on electrically conductive polyaniline (PANI) intercalated–exfoliated VOH, achieved by preintercalation of an aniline monomer and its in situ polymerization within the oxide interlayers. The resulting graphene-like PANI–VOH nanosheets possess a greatly boosted reaction-controlled contribution to the total charge storage capacity, resulting in more material undergoing the reversible V5+ to V3+ redox reaction. The PANI–VOH electrode obtains an impressive capacity of 323 mAh g–1 at 1 A g–1, and state-of-the-art cycling stability at 80% capacity retention after 800 cycles. Because of the facile redox kinetics, the PANI–VOH ZIB obtains uniquely promising specific energy–specific power combinations: an energy of 216 Wh kg–1 is achieved at 252 W kg–1, while 150 Wh kg–1 is achieved at 3900 W kg–1. Electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT) analyses indicate that with PANI–VOH nanosheets, there is a simultaneous decrease in the charge transfer resistance and a boost in the diffusion coefficient of Zn2+ (by a factor of 10–100) vs the VOH baseline. The strategy of employing PANI for combined intercalation–exfoliation may provide a broadly applicable approach for improving the performance in a range of oxide-based energy storage materials.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
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2020
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IF 3.693
Gui Yang,Lei Yang,Fan Bao An
Zinc ion batteries (ZIBs), as promising alternatives of lithium ion batteries (LIBs), have aroused revived interest in the energy storage field recently. To obtain good performance, the choice of electrolyte plays a vital role. Therefore, in this work, three kinds of aqueous electrolyte have been assessed for interfacial effect and ZIB performance. Through the comparison, ZnSO4 electrolyte showed advantages on ionic conductivity over both Zn(NO3)2 and Zn(CH3COO)2 solution, Zn(CH3COO)2 exhibited considerable Zn stripping/plating kinetics with ZnSO4, and there was no characteristic peak pair of Zn dissolution/deposition found in Zn(NO3)2. Additionally, a lower charge transfer resistance was proved when the cell with 1 M ZnSO4 solution. Besides, to further study on cathodic graphite paper, activation and optimization has been conducted, and cells with optimized graphite paper showed an outstanding enhancement.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2022
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IF 7.336
Pengfei Sun,Wenxiu Liu,Daiwen Yang,Yan Zhang,Weiming Xiong,Sha Li,Jiajia Chen,Jinghua Tian,Li Zhang
In aqueous electrolyte, the hydration of solvated zinc ions and the unstable deposition interface exacerbate the accumulation of Zn dendrites and the generation of by-products, making it difficult to achieve highly reversible and long-life Zn-ion batteries (ZIBs). Herein, a high-modulus agarose gel electrolyte (AGE) with greatly suppressed H 2 O molecule mobility, is designed to overcome the above challenges. The ample hydroxyl (-OH) functional groups on the double helix chain of the AGE can capture and anchor H 2 O molecules via hydrogen bonding, thus fundamentally regulating the coordination environment of Zn 2+ and enhancing the stability of deposition interface. Moreover, the -OH functional groups can also effectively immobilize sulfate ions and largely confine their free diffusion, thereby greatly inhibiting the formation of zinc hydroxysulfate by-product. As such, the dendrite issue and side reactions can be significantly mitigated using our designed AGEs, holding great promise for ZIBs with extended cycling durability and high safety.
研究领域:
电化学
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储能材料
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Changxin Lin,Yongchuan Liu,Xiangxin Zhang,Xiaofei Miao,Yuanqiang Chen,Sujing Chen,Yining Zhang
The Zn-ion batteries (ZIBs) are considered as one of the most compelling candidates for large-scale energy storage due to their high capacity, cost-effectiveness, high output potential, safety, and eco-friendliness. However, the application of ZIBs is being seriously hindered by the dendritic formation on Zn electrode surfaces , which always leads batteries to circuit-short and failure. We report a discovery regarding the use of polyvinylpyrrolidone (PVP), a non-ionic polymer, as a highly efficient electrolyte additive to induce uniform Zn plating. Various characterizations reveal that PVP molecules are electrostatically adsorbed on zinc protrusions during zinc ion plating, inhibiting the development of zinc protrusions and guiding uniform plating of Zn 2+ . The Zn anode using PVP-additive electrolyte has a long plating/stripping cycle life of 1000 h at a current density of 0.5 mA cm −2 . When coupled with a MnO 2 cathode, the full cell of Zn–MnO 2 with PVP-additive electrolyte achieves boosted stability (89.1% capacity retention after 500 cycles) than that with normal electrolyte (30.1% capacity retention after 158 cycles). The results of the study suggest new ideas for inexpensive and efficient electrolyte engineering strategies for high-performance ZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）