INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Jiawei Lin,Zhongnan Guo,Niu Sun,Kunjie Liu,Shihui He,Xin Chen,Jing Zhao,Quanlin Liu,Wenxia Yuan
Hybrid tetrahedral Mn(II)-based halides show great potential for narrow-band green emitters, which could be applied in the liquid crystal display field. However, the strategy to improve the chemical stability of tetrahedral Mn hybrids has not been fully investigated. Here, we demonstrate that Zn doping can be an effective route to significantly improve the stability of tetrahedral Mn hybrids under air conditions without compromising the luminous efficiency. A new bromide (ABI)2MnBr4 (ABI = 2-aminobenzimidazole) is synthesized, which exhibits a typical zero-dimensional structure with isolated [MnBr4]2– tetrahedra in the P1̅ space group. Under 450 nm excitation, a narrow-band green-emitting peak at 516 nm is observed with a full width at half maximum of 42 nm. It is indicated that spontaneous phase transition from the tetrahedral to octahedral motif occurs in this Mn hybrid driven by humidity, combined with the emission color change from green to red. Interestingly, this phase transition could be strongly suppressed by Zn doping with a very low doping amount (5%), leading to the significantly improved chemical stability of (ABI)2MnBr4 without reducing the photoluminescence quantum yield. Our work provides a simple and feasible strategy to enhance the chemical stability of the green-emitting (ABI)2MnBr4, and it may also be applicable for other tetrahedral Mn-based hybrids.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·090512
·
IF 4.316
Yuebing Wang,Dunpeng Yang,Aling Chen,Qingfeng Yi
The development of an efficient, stable and low-cost cathode catalyst is necessary for the practical application of Zn-air batteries. In this paper, Fe3+/Co2+ ions were in situ incorporated into polydopamine during the polymerization of dopamine on the surface of the SiO2 spheres. After subsequent pyrolysis and leaching SiO2, the products loaded with different metals (NHCS-Fe, NHCS-Co, NHCS-Fe1Co0.6, NHCS-Fe1Co4, NHCS-Fe1Co10) were obtained. The samples possess a typical hollow carbon sphere (HCS) structure and show efficient oxygen reduction reaction (ORR) performance under neutral and alkaline conditions. Especially in the neutral electrolyte, the NHCS-Fe exhibits the comparable electrochemical catalytic activity to the commercial Pt/C. For NHCS-Fe, its ORR half-wave potential in neutral and alkaline media is 0.78 V and 0.83 V respectively. Corresponding neutral Zn-air battery reveals a maximum power density of 118.8 mW·cm−2, while they are respective 0.82 V and 46.99 mW·cm−2 for Pt/C. Alkaline Zn-air battery with NHCS-Fe releases a maximum power density of 262.4 mW·cm−2, displaying superior performance to Pt/C. Our work is instructive for the synthesis of novel ORR catalysts with outstanding activity by a versatile synthesis strategy.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Meng Yu,Qiliang Wei,Mingjie Wu,Jie Wu,Jieyu Liu,Gaixia Zhang,Shuhui Sun,Weichao Wang
Developing earth abundant and highly active electrocatalysts to overcome the sluggish oxygen reduction kinetics is one of the key toward the practical applications of air batteries with economic efficiency and high energy density. Herein, a shape-controlled synthesis of mullite SmMn 2 O 5 is achieved through a surfactant-free one-step hydrothermal method. SmMn 2 O 5 nanoparticles (SmMn 2 O 5 -NPs) and nanorods (SmMn 2 O 5 -NRs) are successfully synthesized and in half-cell tests, SmMn 2 O 5 -NRs perform enhanced oxygen reduction activity relative to SmMn 2 O 5 -NPs in terms of a more positive half-wave potential and reduced peroxide yield. Importantly, rechargeable zinc-air batteries constructed with SmMn 2 O 5 -NRs exhibit not only higher peak power density (217 mW cm −2 ) over commercial Pt/C catalyst (190 mW cm −2 ) but also excellent cycling stability during long-term charging-discharging test over 170 h. The facile synthesis of SmMn 2 O 5 -NRs together with the remarkable electrocatalytic performance endows mullite SmMn 2 O 5 with great promise in replacing the precious metal as future catalysts for air batteries.
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DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shuaiqi Han,Jingjing Jiang,Xinge Liu,Bingyan Li,Kangjie Zhang,Shasha Hao,Shaotang Yu,Weibo Yan,Hao Xin
The state-of-the-art copper indium gallium selenide Cu(In,Ga)Se2 (CIGS) thin-film solar cells are fabricated based on vacuum methods and use cadmium sulfide as the buffer layer. Considering the cost-effective production and environmental safety, fabrication of a CIGS absorber via the solution process and using a cadmium-free buffer layer is desirable. Here, we report engineering of a chemical-bath-deposited zinc sulfoxide Zn(S,O) buffer layer for solution-processed CIGS solar cells. Our results show that optimization of the deposition time and annealing process of the Zn(S,O) film to avoid cracking is critical to obtain a dense and uniform Zn(S,O) buffer layer. Benefited from the large band gap of Zn(S,O) and light-soaking-induced device performance improvement, a champion CIGS solar cell with a power conversion efficiency of 12.0% (without antireflection coating) has been achieved. This is the first time that the Zn(S,O) buffer layer has been applied to a solution-processed CIGS absorber and achieves highly efficient CIGS solar cells. The effect of light-soaking on the heterojunction property and the stability of device performance are discussed.
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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.
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DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 27
·13083-13091
·
IF 7.233
Jianwei Han,Kai Wang,Wenhao Liu,Chen Li,Xianzhong Sun,Xiong Zhang,Yabin An,Sha Yi,Yanwei Ma
In this paper, we developed a novel Zn-ion hybrid cell based on a graphene-conducting polymer composite hydrogel (capacitor-type) cathode and a zinc metal (battery-type) anode. The pseudocapacitive-type cathode materials can effectively boost the capacity of Zn-ion hybrid cell compared to that of electrical double layer cathode materials. In particular, the composite hydrogel with rational designed three-dimensional (3D) nano-architecture combining 3D porous nanostructure with hydrogel, can significantly enlarge the active interfaces between the electrode and electrolyte. According to our experiments, the 3D graphene@PANI composite hydrogel electrode exhibits a large capacity of 154 mA h g−1, a superior rate capability and excellent capacity retention of 80.5% after 6000 charge–discharge cycles in a Zn-ion hybrid cell. The outstanding electrochemical properties demonstrate that the 3D nanostructure composite hydrogel materials can effectively promote the material utilization, transport of charges, and reduce the degradation of conducting polymers, leading to a highly efficient, fast and stable electrochemical process. Based on our results, Zn-ion hybrid cells based on a composite hydrogel electrode could be an extremely promising candidate for next generation electrochemical energy storage devices.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Zhipeng Xie,Baolu Liu,Chenfan Xie,Bin Yang,Yunfen Jiao,Dingjian Cai,Liang Yang,Qi Shu,Anhong Shi
Zn/Ce redox flow battery (ZRFB) is emerging as a promising technology to store large amount of energy economically and efficiently, wherein a highly efficient positive electrode with a continuous and fast electronic and ionic transportation path is urgently desired. The unique nanostructure of reduced graphene oxide (RGO) paper electrode is prepared by a simply chemical reduction method, which facilitates transference of the electron and Ce 3+ /Ce 4+ at the electrolyte/electrode interface. Thus ZRFB exhibits superior extent of charge (81.0%) and energy efficiency (71.3%). The results show RGO paper is a good candidate for positive electrode of ZRFB.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 39
·22287-22295
·
IF 10.733
Qi Han,Xiaowei Chi,Yunzhao Liu,Liang Wang,Yuexiu Du,Yang Ren,Yu Liu
The rapid development of flexible and wearable electronics calls for advanced batteries with high safety, long cycling stability, and low cost. Aqueous Zn metal batteries (ZMBs) are some of the most promising candidates. The main challenges are the water-induced parasitic reactions (corrosion and passivation) and dendrite-driven battery failure in traditional liquid electrolytes. Developing new electrolyte systems is critical to overcoming these issues. Herein, an ultrastrong self-standing gelatin-based solid-state electrolyte (GSE) formed by strong hydrophobic interaction between gelatin molecule chains is first introduced for stable solid-state ZMBs. The GSEs prepared by a facile soaking strategy contain much less free water compared to conventional electrolyte systems and exhibit the highest fracture tensile strength of 2.78 MPa among the reported self-standing single-component solid-state electrolytes for ZMBs, which effectively inhibit the corrosion/passivation reaction and enable the Zn/Zn symmetric cells to stably cycle at hitherto the highest current density of 5 mA cm−2 with record high cumulative plating/stripping capacity. Meanwhile, the solid-state Zn/MnO2 full cell can deliver a high reversible specific capacity of 285 mA h g−1, superior cycling stability (90% capacity retention/500 cycles), and excellent safety under extreme working circumstances. The impressive performance sheds light on the design and applications of robust solid-state electrolytes for ZMBs.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhe-Jian Yi,Xiao-Yue Chen,Jia-Zhen Zhao,Yi-Ming Xie,Ji-Huai Wu,Zhang Lan,Fu-Da Yu,Lan-Fang Que,Hao Luo
Zn||V 2 O 5 full cell exhibit excellent low-temperature performance in Zn(ClO 4 ) 2 based electrolytes due to the strong hydrogen bond breaking effect. However, the crosstalk effect between the V 2 O 5 cathode and Zn anode at room temperature leads to continuous side reactions, highly limiting their practical application. Herein, a water deactivation strategy by introducing methanol additive has been proposed and its effect mechanism on the crosstalk has been explored. It is found that the methanol additive is conducive to build a water-poor solvation structure and reduce the activity of free water, inhibiting the corrosion and improving the cycle stability of Zn anode. In addition, methanol additive triggers the reversible cycling of inert Zn 3 (OH) 2 (V 2 O 7 )(H 2 O) 2 , and suppress its deposition on Zn anode, then breaking the electrochemical crosstalk problem of the Zn||V 2 O 5 system. As expected, the Zn||V 2 O 5 full cell at the designed electrolyte demonstrates superior performance at room and low temperature, delivering a high specific capacity of 300 mAh g −1 at 25 °C, and operating stably for 7500 (>2000 h) cycles without capacity loss at −20 °C, which are superior to most reported works. This work might provide new ideas for addressing electrochemical crosstalk and constructing advanced batteries with superior temperature adaptability.
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhanjian Liu,Linfeng Zhu,Shengdi Qu,Xuelin Liu,Xiguang Zhang,Meiling Li,Jing Jing,Huaiyuan Wang
Scaling is an ineluctable challenge facing humanity in industrial production. Although superhydrophobic coatings have been proven to possess anti-scaling effects, they are generally limited by fragile mechanochemical durability. Herein, a thermoplastic polyurethane (TPU)/polyvinylidene fluoride (PVDF)/microcapsules (MCs)/nanocarbon fiber (CNF) composite coating with superhydrophobicity (water contact angle of 155°) and superoleophilicity (oil contact angle of 0°) has been successfully prepared by spraying method. The scale inhibitor of EDTA-Zn was encapsulated in polyurea@SiO 2 shell via Pickering emulsion polymerization route. Owing to the sustained release of EDTA-Zn and the shielding oil layer formed by capturing oil molecules, the prepared coating is capable of inhibiting the adhesion of CaCO 3 scale nucleation and inducing the growth of aragonite CaCO 3 scale, which is more likely to detach from the coating surface compared to calcite . Thus, in simulated oil field production fluid, the prepared coating demonstrated excellent anti-scaling property with an extremely low CaCO 3 deposited weight of 0.072 mg/cm 2 . Simultaneously, because of the stable shielding oil film on the coating surface , the prepared coating exhibited excellent corrosion resistance , with a low I corr of 7.39 × 10 −9 A/cm 2 and a corrosion rate of 8.06 × 10 −5 mm/year. In addition, the prepared coating also shown excellent mechanical durability, anti-fouling and self-cleaning qualities. We anticipate that our work will offer a new approach to the development and production of industrial anti-scaling and anti-corrosion coatings.
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Xiao Li,Xue-wei Wang,Xiao-Ran Wen,Shi-qi Li,Kun Zhang,Jia-cheng Yu,Yan Guo
Mn-based mullite, with its unique structure featuring two distinct Mn coordination environments, has garnered significant attention in the research and development of oxygen reduction reaction (ORR) catalysts. The nucleation and growth of SmMn 2 O 5 were influenced by controlling the hydrothermal reaction time and temperature, resulting in SmMn 2 O 5 with varying degrees of crystallinity. With the increase of hydrothermal temperature and time, the crystallinity of SmMn 2 O 5 is enhanced, and the morphology changes from an amorphous lamellar structure to a finer and longer nanorod structure. SmMn 2 O 5 with an amorphous lamellar structure prepared at 150 °C for 3 h has a maximum specific surface area of 355.35 m 2 g −1 . The electrochemical results indicate that the amorphous lamellar SmMn 2 O 5 shows excellent ORR performance with a half-wave potential of 0.76 V. This is mainly due to the fact that crystallinity induces an increase in the number of oxygen vacancies, which increases the number of active sites and changes the valence state of Mn. The amorphous lamellar SmMn 2 O 5 was used as a cathode in zinc-air batteries with a power density of 119 mW/cm 2 , showing potential applications. This work demonstrates an effective and simple strategy for increasing the number of oxygen vacancies in SmMn 2 O 5 , which helps the development and application of SmMn 2 O 5 in the field of electrocatalysis.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiqi Zhao,Yang Liu,Huawei Rong,Dapeng Zhu,Lianze Ji,Rongzhi Zhao,Xuefeng Zhang
The design of defects and microstructures plays a crucial role in optimizing the electromagnetic wave (EMW) absorption performance of ferrites. However, the limited loss characteristics and simple phase structure of conventional ferrites severely hinder their further development. In this study, a series of Ni-Zn 18H hexaferrites were successfully synthesized by solid-state reaction method, and precise compositional optimization was carried out. By adjusting the concentration ratio of Ni and Zn metal ions, the effective absorption bandwidth (C to Ku band) of reflection loss can be adjusted. Notably, the Ni-Zn 18H hexaferrite with x = 1 achieved an optimal reflection loss of −33.33 dB at 6.53 GHz, with a matching thickness of 5.5 mm, and its effective absorption bandwidth extended to 2 GHz. The experimental results indicate that compositional modulation can cause substantial lattice distortion and oxygen vacancies, thereby enhancing defect-induced polarization and improving the magnetic loss performance of the material. Consequently, these structural defects contribute to achieving excellent tunable EMW absorption performance. This study, therefore, provides valuable insights into the development of waveband-tunable EMW absorbers through defect engineering.
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DOI
高影响因子
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