SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xuanbing Wang,Junli Wang,Wenhao Jiang,Chen Chen,Bohao Yu,Ruidong Xu
In industrial zinc electrowinning, the anodic oxygen evolution reaction (OER) has sluggish kinetics leading to ultrahigh overpotential and energy consumption. Herein, a sandwich-like MnCo 2 O 4 modifying PbO 2 composite electrode was fabricated via chemical-bath-deposition and electrodeposition. Consequently, the synthesized PbO 2 electrode exhibits low Tafel slope of 0.17 V per decade and an operating potential of 1.68 V vs. SCE for 500 A m −2 in a simulated solution containing 150 g L −1 H 2 SO 4 and 50 g L −1 Zn 2+ . Compared with traditional Pb-0.76Ag alloy, the overpotential at 500 A m −2 decreased by 357 mV, which ascribe to the incorporation of MnCo 2 O 4 minoring crystal grain size and charge transfer resistance and enlarging active surface area. Furthermore, the composite electrode shows robust durability as long as 95 h at 15,000 A m −2 in 0.5 M H 2 SO 4 electrolyte. Hence, this study offers a facile synthesis route to prepare composite electrodes for zinc electrowinning and provides deep insight into the relationship among modifying substances, microstructures, and electrocatalytic activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Liwei Cheng,Qiaonan Zhu,Jiandong Liang,Mengyao Tang,Yan Yang,Sicong Wang,Puguang Ji,Gongkai Wang,Wenxing Chen,Xiuhui Zhang,Hua Wang
Aqueous zinc-ion batteries (ZIBs) are regarded as a promising candidate for ultrafast charge storage owing to the high ionic conductivity of aqueous electrolytes and high theoretical capacity of zinc metal anodes. However, the strong electrostatic interaction between high-charge-density zinc ions and host materials generally leads to sluggish ion-transport kinetics and structural collapse of rigid cathode materials during the charge/discharge process, so searching for suitable cathode materials for ultrafast and long-term stable ZIBs remains a great challenge. Herein, flexible electron-rich ion channels enabling fast-charging and stable aqueous ZIBs have been demonstrated. Because of the nitrogen-rich conjugated structure of organic phenazine (PNZ) molecules, electron-rich ion channels are formed with the C═N redox centers situated on the channel surface, where zinc ions can transport rapidly and react with active moieties directly. Meanwhile, the π-conjugated systems and inherent flexibility of PNZ molecules can accommodate rapid strain changes and maintain their structural stability during zinc-ion intercalation/deintercalation. Consequently, they exhibit a high capacity of 94.2 mAh g–1 at an ultrahigh rate of 700C (208.6 A g–1) and an ultralong life over 100,000 cycles at 100C, which are superior to those of previously reported aqueous ZIBs. Our work presents a new way for developing ultrafast and ultrastable aqueous ZIBs.
研究领域:
电化学储能
·
材料化学
·
能源科学
·
纳米材料
·
电化学
·
功能材料
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 1
·430-437
·
IF 6.788
Mengyu Hong,Jingjing Meng,Huihui Yu,Junli Du,Yang Ou,Qingliang Liao,Zhuo Kang,Zheng Zhang,Yue Zhang
Zinc oxide (ZnO) has been widely considered as a promising candidate in electro-chemical devices due to the high electrical transport performance and easy-fabrication. However, the active chemical properties of ZnO nanobelts restrict their application in practical electro-chemical devices. Here, we adopted an indium doping strategy to improve the corrosion resistance of ZnO nanobelts. Compared with other atomic doping methods, the indium doping method not only formed several layers of indium atoms in the body of ZnO nanobelts but also created a ZnxIn1−xO passivated layer on the ZnO nanobelt surface. After doping indium atoms into ZnO nanobelts, the self-corrosion potential increased and the self-corrosion current decreased which greatly reduced its corrosion rate in the electrochemical solution. Furthermore, the electrical transport properties of indium-doped zinc oxide (In–ZnO) nanobelts presented ultrahigh stability even after being soaked in the electrochemical solution for 43 hours. The enhanced anticorrosive quasi-2D ZnO nanobelts offer a promising development of ZnO-based electro-chemical devices.
研究领域:
材料科学
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Weicai Liu,Hui Zong,Mengshu Li,Ziquan Zeng,Shijing Gong,Ke Yu,Ziqiang Zhu
A two-dimensional MXene (Ta4C3) was innovatively used herein to modulate the space group and electronic properties of vanadium oxides, and the MXene/metal–organic framework (MOF) derivative VO2(B)@Ta4C3 with 3D network cross-linking was prepared, which was then employed as a cathode to improve the performance of aqueous zinc ion batteries (ZIBs). A novel method combining HCl/LiF and hydrothermal treatments was used to etch Ta4AlC3 to obtain a large amount of accordion-like Ta4C3, and the V-MOF was then hydrothermally grown on the surface of the stripped Ta4C3 MXene. During the annealing process of V-MOF@Ta4C3, the addition of Ta4C3 MXene liberates the V-MOF from agglomerative stacking, allowing it to show additional active sites. More significantly, Ta4C3 prevents the V-MOF in the composite structure from converting into V2O5 of space group Pmmn but into VO2(B) of space group C2/m after annealing. A considerable advantage of VO2(B) for Zn2+ intercalation is provided by the negligible structural transformation during the intercalation process and the special tunnel transport channels, which have an enormous area (0.82 nm2 along the b axis). According to first-principles calculations, there is a strong interfacial interaction between VO2(B) and Ta4C3, which deliver remarkable electrochemical activity and kinetic performances for the storage of Zn2+. Therefore, the ZIBs prepared with the VO2(B)@Ta4C3 cathode material exhibit an ultra-high capacity of 437 mA h·g–1 at 0.1 A·g–1 while showing good cycle performance and dynamic performance. This study will offer a fresh approach and a reference for creating metal oxide/MXene composite structures.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xiaobin Hui,Zhen Zhan,Zeyu Zhang,Jingya Yu,Pengyan Jiang,Zhengzheng Dang,Jian Wang,Songhua Cai,Yanming Wang,Zheng-Long Xu
Solid-state polymer electrolytes (SPEs) are promising for high-performance zinc metal batteries (ZMBs), but they encounter critical challenges of low ionic conductivity, limited Zn2+ transference number (tZn2+), and an unstable electrolyte-electrode interface. Here, we present an effective approach involving a missing-linker metallic organic framework (MOF)-catalyzed poly(ethylene glycol) diacrylate (PEGDA)/polyacrylamide (PAM) copolymer SPE for single Zn2+ conduction and seamless electrolyte-electrode contact. The single-Zn2+ conduction is facilitated by the anchoring of the OTF– anions onto the unsaturated metal sites of missing-linker MOF, while the PEGDA and PAM chains in competitive coordination with Zn2+ ions promote rapid Zn ion transport. Our all-solid-state electrolyte simultaneously achieves a superior ionic conductivity of 1.52 mS cm–1 and a high tZn2+ of 0.83 at room temperature, alongside uniform Zn metal deposition (1000 cycles in symmetric cells) and high Zn plating/striping efficiencies (>99% after 600 cycles in asymmetric cells). Applications of our SPE in Zn//VO2 full cells are further demonstrated with a long lifespan of 2000 cycles and an extremely low-capacity degradation rate of 0.012% per cycle. This work provides an effective strategy for using a missing-linker MOF to catalyze competitively coordinating copolymers for accelerating Zn2+ ion conduction, assisting the future design of all-solid-state ZMBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
Wei Ling,Funian Mo,Jiaqi Wang,Qingjiang Liu,Yao Liu,Qixin Yang,Yejun Qiu,Yan Huang
The poor stability of zinc anodes caused by uneven deposition/stripping of zinc has inevitably limited the practical application of zinc-based aqueous batteries (ZABs). And the self-healing property is very necessary for improved lifespan and reliability of the flexible batteries under various deformations during their daily usage. In this work, a new self-healable hydrogel electrolyte (SHE) with rigid-flexible backbones is synthesized by cross-linking polymerization and composite strengthening. Owing to porous crosslinking network and more hydrophilic groups, the SHE possesses high ionic conductivity (23.1 mS/cm at 25 °C) and excellent mechanical strength , and the hydrophilic groups are conductive to improve interfacial compatibility between electrode and electrolyte, prompting much more disciplined Zn metal plating/stripping. And the dynamic hydrogen bonds derived from the hydroxyl groups of the polymer backbone can prompt self-healing and stretchable property of SHEs. As a result, the assembled flexible zinc-manganese dioxide batteries delivered a high capacity of 304 mAh g −1 at 0.5 A g −1 and good cycling stability with a capacity retention of 83.1% (vs. 62.5% with polyacrylamide) after 1500 charge/discharge cycles at 5.0 A g −1 . Furthermore, the flexible batteries with SHEs can recover electrochemical performance with over 95% healing efficiency after 5 cycles of complete breaking/healing.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米科技
·
先进功能材料
·
界面科学
·
可持续能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zihan Chen,Yaohong Zhang,Zhi Li Teh,Jianfeng Yang,Lin Yuan,Gavin J. Conibeer,Robert J. Patterson,Qing Shen,Shujuan Huang,Zhilong Zhang
Quantum dots (QDs) have a wide range of applications in the field of optoelectronics. They have been playing multiple roles within the configuration of a device, by serving as the building blocks for both the active layer and the carrier transport layer. While the performance of various optoelectronic devices has been steadily improving via developments in passivating the QD active layer, the possible improvement via passivation of the QD-based carrier transport layer has been largely overlooked. Here, with lead sulfide QD photovoltaics as the platform of study, we demonstrate that the device performance can be significantly improved by passivating the QD hole transport layer (HTL) with zinc salt post-treatments. The power conversion efficiency is improved from 8.7% of the reference device to 10.2% and 9.5% for devices with zinc acetate (ZnAc)- and zinc iodide (ZnI2)-treated HTLs, respectively. Transient absorption spectroscopy confirms that both treatments effectively reduce band-tail states and increase carrier lifetime of the HTLs. Further elemental analysis shows that ZnAc provides a higher amount of Zn2+ for passivation while maintaining the function of HTL by allowing essential p-doping oxidation. In contrast, the additional I– passivation from ZnI2 inhibits p-doping oxidation and limits the function of HTL. This work demonstrates the potential of improving device performance by passivating the QD-based HTLs, and the method developed is likely applicable to other optoelectronic devices.
研究领域:
光电子学
·
纳米材料
·
光伏技术
·
半导体物理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Lixin Song,Pingfan Du,Jie Xiong,Frank Ko,Can Cui
ZnO nanoparticles (ZNPs) and ZnO nanowires (ZNWs) were fabricated via electrospinning and calcination . The ZNPs and ZNWs were blended with different mass ratio by varying ZNWs from 0% to 100% and serviced as photoanodic film of dye-sensitized solar cells (DSSCs) via spin coating . The efficiency of these DSSCs reached a maximum of 2.6% at 20 wt% ZNWs. In order to improve the photovoltaic properties of ZNWs/ZNPs hybrid photoanodic film, the ZNWs/ZNPs hybrid film was modified by the incorporation of multi-walled carbon nanotubes (MWCNTs) into ZnO matrix including both ZNPs and ZNWs combined with TiCl 4 post-treatment. As a result, the efficiency of DSSCs increased from 2.6% to 3.8%, which is mainly attributed to the increased dye loading, faster electron transport , and less electron loss.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏技术
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 11
·7068-7075
·
IF 1.676
Li Shuhui,Zhou Ying,Cui Lijun,Ge Zhenhua,Feng Jing
In 2 O 3 (ZnO) k superlattice ceramics are promising oxide thermoelectric materials, as superlattice interfaces are effective in scattering phonons and filtering low-energy electrons to decrease thermal conductivity and improve the figure of merit ( ZT ) value. In this work, homologous compounds were prepared by solid-state reaction method using ZnO and In 2 O 3 as raw materials. Phase purity and crystal structure were characterized by x-ray diffraction, revealing that In 2 O 3 (ZnO) k crystallizes in an R3 m space group for odd k values and P6 3 /mmc for even k values. The study of thermoelectric (TE) properties showed that as k increased, the thickness of InO(ZnO)
+ 3
also increased, while the electrical conductivity, thermal conductivity, Seebeck coefficient, power factor and ZT value were all decreased. In 2 O 3 (ZnO) 3 samples obtained a maximum power factor of 651 μ W m −1 K −2 at 973 K, and also achieved a maximum ZT value of 0.24 at 973 K.
研究领域:
材料科学
·
凝聚态物理
·
能源转换技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Huayao Chen,Hongkai Deng,Ximing Zhong,Hongjun Zhou,Jinghui Zhan,Xinhua Zhou
Nano zinc oxides (ZnO) had aroused enthusiastic attention in bacteriostasis. However, the antibacterial efficiency of the nano ZnO was greatly reduced due to agglomeration during the practical application. Herein, an effective approach to the uniform dispersion of ZnO on montmorillonite (Mt) intercalated by porous silica was reported to improve the antibacterial efficiency. A petal-like silica-clay composite (SC) loaded with ZnO (SC/ZnO) was synthesized, the appropriate ratio of Mt and TEOS to completely exfoliated the Mt sheets was explored, which was 0.88 g Mt and 2 mL TEOS . Benefiting from the microporous silica microspheres , the composites possessed a large specific surface area about 239 m 2 /g and well-dispersed ZnO, with a similar zinc content of Mt-ZnO about 10%. Comparatively, SC/ZnO composites showed enhanced antibacterial activity against Staphylococcus aureus with respect to Mt-ZnO. The results indicated that silica modification provided a promising strategy to improve the bacteriostatic efficiency of "metal oxide-clay" composites.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Qianhui Zhang,Yingxin Zhang,Lanzhi Ke,Haonan Jiang,Yuan Huang,Zanxiang Nie,Shunyu Jin
Hydrogel electrolytes based on natural polymers have attracted increasing attention in zinc-ion batteries (ZIBs) powering wearable and implantable electronics, but designing natural polymer hydrogels with high ionic conductivity , excellent transference performance, and inhibited Zn dendrites is still challenging. Herein, two natural biocompatible polymers (sodium alginate (SA) and agarose (AG)) are used to prepare composite hydrogel electrolytes ensuring electrostatic interaction between –COO – groups in SA and Zn 2+ and coordination between C–O–C groups in AG and Zn 2+ . The as-obtained hydrogels exhibit an elevated ionic conductivity (25.05 mS cm −1 ) with a high transference number (0.75), useful for facilitated efficient Zn 2+ transport. The theoretical calculations combined with experimental results reveal C–O–C groups endowing the as-prepared hydrogels with improved desolvation kinetics and capture ability of Zn 2+ for achieving dendrite-free Zn deposition. In this way, the assembled Zn symmetric cell shows a long cycle life reaching 700 h at 0.2 mA cm −2 . The exceptional biocompatibility of the hydrogels also results in cell viability assay with a survival rate above 93.5 %. Overall, the proposed hydrogel electrolytes endow solid-state ZIBs with high discharge capacity, outstanding rate performance, long cycle life, good antifreeze capability, and impressive flexibility, useful features for future design and development of advanced ZIBs.
研究领域:
生物材料学
·
电化学储能
·
可穿戴设备
·
植入式医疗器械
·
锌离子电池
·
组织工程
·
转化医学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yao Xiong,Qingning Li,Ketong Luo,Lu Zhong,Guangfeng Li,Shengkui Zhong,Dongliang Yan
Aqueous zinc ion batteries (AZIBs) have got increasingly worldwide attention in virtue of the excellent advantages of cheap price, safety and high specific capacity. Nevertheless, the formation of dendrites and the hydrogen evolution reaction on the Zn anode leads to low cycle life and restrict their commercial application. In this paper, an inexpensive, safe, eco-friendly and effective electrolyte additive , carboxymethyl cellulose (CMC), which can guide a uniform Zn deposition during the plating and stripping process and further inhibit the growth of dendrite, has been proposed. The experimental results indicate that the Zn//Zn symmetric cells show remarkable cycling performance for >600 h at a current density of 5 mA cm −2 with 1 mAh cm −2 and 1000 h at a current density of 1 mA cm −2 with 1 mAh cm −2 , respectively. In addition, the Zn//V 2 O 5 full cells with addition of CMC can obtain a desirable specific capacity for 173 mAh g −1 and keep a high-capacity retention of 54.2 % (19.5 % for without CMC additive) after 1000 cycles at 2A g −1 . A reasonable improved mechanism of electrochemical performance by addition of CMC electrolyte additive has been proposed. This work demonstrates that addition of CMC in electrolyte is a promising strategy for inhibiting Zn dendrite and corrosion in AZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）