Journal of Physical Chemistry C
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2025
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IF 3.2
Shixue Zhong,Yan Xin,Li’e Mo,Bijiao He,Fang Zhang,Chen Zhao,Linhua Hu,Huajun Tian
Manganese-based layered compounds offer promising cathode materials for aqueous zinc-ion batteries (AZIBs) due to their high safety, low cost, and environmental friendliness. However, their sluggish reaction kinetics, poor conductivity, and irreversible manganese dissolution result in severe capacity fading. Herein, a simple two-step method is successfully proposed to intercalate Ba2+ ions into layered manganese oxide (Ba-MnO2), which were utilized as cathode materials for AZIBs. Ba2+ ions have been innovatively introduced into the MnO2 cathode, generating abundant oxygen vacancies. Notably, the incorporated Ba2+ spontaneously forms an in situ BaSO4 layer during charging, which functions as a protective cathode electrolyte interface. These improvements promote the conductivity and ion diffusion of MnO2, enabling a reversible MnO2/Mn2+ deposition/dissolution reaction. The Zn//Ba-MnO2 full battery delivers a high capacity of 355 mA h g–1 at 0.3 C and maintains an ultrastable cycling stability of over 1200 cycles even at 3 C. This work provides an innovative strategy and a profound understanding of designing high-performance cathodes for AZIBs.
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
NANOTECHNOLOGY
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2025
·Vol. 36
·期 14
·145601
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IF 2.8
Xinyu Shi,Libo Deng,Lingna Sun,Qianling Zhang,Xiangzhong Ren,Yongliang Li
Manganese dioxide (MnO2) is recognized as a promising candidate for the oxygen evolution reaction (OER); however, its practical application is hindered by limited active sites and low electrical conductivity. Fluorine (F), known for its strong electron affinity and electronegativity, can modulate the surface electronic structure and physicochemical properties of catalysts. In this study, we synthesized MnO2 nanosheets and fluorine-doped MnO2 (F-MnO2) using simple hydrothermal and ion-exchange methods. We then assessed the influence of fluorine doping on the intrinsic OER activity and stability of these catalysts, as well as their underlying catalytic mechanisms. By manipulating the amount of fluorine introduced and the fluorination temperature, we explored the relationship between varying fluorine concentrations and OER performance. The experimental results show that F-MnO2 exhibits higher OER activity than pristine MnO2. At a current density of 10 mA cm–2, the overpotential required for F-MnO2 is merely 320 mV, substantially lower than that of pristine MnO2. This enhanced performance is ascribed to fluorine doping, which leads to an increased quantity of active Mn3+ centers and oxygen vacancies, along with an expanded electrochemically active surface area. Furthermore, F-MnO2 displays improved stability during the testing period. It maintains long-term stability for over 25 h, further corroborating the catalyst's excellent anti-oxidation and anti-corrosion properties in alkaline water electrolysis.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 9
·094002
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IF 3.399
Desheng Li,Yu Zhang,Kun Rui,Huijuan Lin,Yan Yan,Xiaoshan Wang,Chao Zhang,Xiao Huang,Jixin Zhu,Wei Huang
Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe3O4 nanoparticles and ultrathin MnO2 nanosheets from inside out, donated as MnO2@Fe3O4@C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO2 and Fe3O4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode–electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO2@Fe3O4@C anode exhibits a high reversible capacity of 946 mAh g−1 at 200 mA g−1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g−1 at 500 mA g−1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Ya Ling Li,Lu Hai Li,Guang Wen Chu,Xiao Fei Zeng,Jian Feng Chen,Lei Shao
Facile preparation of MnO 2 with large specific surface area was explored in a rotor–stator reactor (RSR). The MnO 2 product was characterized by FESEM, TEM, XRD, XPS, TG, FTIR and automated surface area and pore size analyzer. The electrochemical performance of the as-prepared MnO 2 nanospheres as an electrode material for supercapacitors was investigated using three-electrode and two-electrode methods. The results show that the MnO 2 nanospheres were well dispersed and had a surface area of 337.01 m 2 g -1 . The specific capacitance was as high as 320.7 F g -1 at 0.3 A g -1 and 477.5 F g -1 at 5 mV s -1 . The as-prepared MnO 2 also exhibited good stability with 107.4 % capacitance retention after 1000 cycles. Moreover, the MnO 2 //active carbon asymmetric supercapacitor in 1 M Na 2 SO 4 electrolyte showed a maximum energy density of 27.23 W h kg -1 and correspondingly power density was 225 W kg -1 .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
BIOMATERIALS
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2022
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IF 15.304
Shupei Tang,Lan Zhou,Haiyang He,Liwei Cui,Zhicheng Ren,Yuhang Tai,Zhunyi Xie,Yi Cao,Dongwei Meng,Qiuli Liu,Yuzhang Wu,Jun Jiang,Xinyuan Zhou
Cancer vaccines are viewed as a promising immunotherapy to eradicate malignant tumors and aim to elicit the patients’ own tumor-specific immune response against tumor cells. However, few cancer vaccines have been applied due to the low immunogenicity of antigen and invalidation of adjuvant. Herein, we designed a tumor microenvironment (TME) responsive MnO 2 -melittin nanoparticles (M-M NPs). The M-M NPs consumed glutathione and produced •OH via Fenton-like reaction in the mimic TME, specifically caused tumor cell death in vitro, activated cGAS-STING pathway in vitro and promoted the maturation of antigen-presenting cells in vitro and in vivo to elicit systemic anti-tumor immune response including the augmentation of tumor-specific T cells and more productions of pro-inflammatory cytokines and chemokines , which all were stronger than MnO 2 NPs and melittin . The anti-tumor effects of M-M NPs were evaluated in three subcutaneous tumor models and the B16–F10 lung metastasis model and the tumor growth and lung metastasis were more obviously inhibited in the M-M NPs treated mice, compared with MnO 2 NPs and melittin treatments. More importantly, only M-M NPs promoted the MHC-I cross-dressing by dendritic cells to prime tumor-specific CD8 + T cells and remarkably suppressed the growth of left tumors if express cognate antigen while treating on the right in the bilateral tumor model. Our findings proposed a strategy to enhance the cancer vaccine efficiency which showed great therapeutic effect on tumor immunotherapy.
研究领域:
免疫学
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纳米技术
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肿瘤学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ChemElectroChem
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2021
·Vol. 8
·期 2
·418-424
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IF 4.59
Zheyuan Wang,Wenluan Gao,Qingli Xu,Xiaona Ren,Shuang Xu,Shuaikang Zhu,Xiaopo Niu,Xiaoxue Li,Rong Zhao,Yunxi Han,Guozhu Li,Qingfa Wang
Graphical Best of the bunch: Four different phases of IrO 2 /MnO 2 are synthesized by using a simple reduction-oxidation method, which can improve oxygen evolution reaction (OER) performance. IrO 2 /α-MnO 2 shows the best OER performance among the four different IrO 2 /MnO 2 catalysts. Developing high-performance, low-loading, Ir-based electrocatalysts for the oxygen evolution reaction (OER) in acidic media is still a great challenge. Herein, we fabricated an iridium manganese catalyst with only 5 % iridium. The influence of the manganese dioxide phase states (α-, β-, γ- and δ-MnO 2 ) on the OER performance of IrO 2 /MnO 2 catalysts was investigated. α-MnO 2 , as the substrate, can generate smaller iridium particles and more high-valence-state iridium to promote OER performance. Therefore, the 5 % IrO 2 /α-MnO 2 electrocatalyst exhibits excellent electrocatalytic OER performance with a high mass activity of 216.67 A/g Ir and 655.33 A/g Ir at 1.53 V in acidic and alkaline media, respectively, significantly outperforming commercial IrO 2 .
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 SOLID STATE CHEMISTRY
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2020
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IF 2.726
Guotai Zhang,Jingze Zhang,Yuan Zhou,Guicai Qi,Jinbo Zeng,Yanxia Sun,Yue Shen,Xiang Li,Xiufeng Ren,Shengde Dong,Chao Sun,Zhaowei Wu,Chunxi Hai,Weiping Tang
Solid-phase reactions were used for the synthetization of the spinel Li 1.6 Mn 1.6 O 4 powder and the lithium ion-sieve MnO 2 ·0.5H 2 O was subsequently obtained by the leaching of the lithium. The physical characterization showed that the polycrystalline precursor and the MnO 2 ·0.5H 2 O were nearly pure spinel, as well as that during the process of the adsorption-desorption, the structural stability was high. The Langmuir isotherm and pseudo second-order kinetics model showed consistency with the adsorption behavior , which indicated the presence of homogeneous adsorption sites for the lithium adsorption and that its process was chemisorption . Adsorbents were found to remain being characterized with a relatively high Li + uptake (26.13 mg g −1 ) with low manganese extracted (1.71%) after the circulation experiment was performed up to 5 times, proving a significant repeatability and stability for the lithium ion-sieve. The concentration factors exhibited the highly selective adsorption capacity for absorbent from Qarhan raw brine with high concentrations of Na + , K + , Ca 2+ , Mg 2+ . The adsorbents could be efficiently used for Li + recovery from Salt Lake brine as well as its excellent potential for further application.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Jie Jin,Man Li,Mengting Tang,Yang Li,Yangyang Liu,Hui Cao,Feihu Li
Hybrid capacitive deionization (HCDI) is an emerging and promising technology for water desalination and has been extensively explored in recent years. Designing a structure-tailorable electrode material has been proved to be a valid strategy for achieving a higher salt adsorption capacity (SAC). In this study, MnO2 materials with tailorable phase compositions and crystallinities were prepared hydrothermally and then evaluated as electrodes for removal of ions from a NaCl solution in a membrane-free HCDI cell. MnO2 electrode materials tested in the HCDI system include poorly crystalline δ-MnO2 along with abundant amorphous phases (MnO2-1h); crystalline δ-MnO2 with plentiful amorphous MnO2 (MnO2-2h); MnO2 mixtures of α-, δ-, and amorphous MnO2 (MnO2-5h); and α-MnO2 nanowires with minor amorphous MnO2 (MnO2-12h). Our results revealed that the phase composition and the crystallinity of MnO2 materials govern their specific capacitances and thus the SAC values. When the cell voltage is 1.2 V, the lamellar-structured poorly crystalline MnO2-1h electrode with the lowest crystallinity demonstrates the highest SACs of 13.84 mg g–1 in 100 mg L–1 NaCl (1.71 mM) and 21.32 mg g–1 in 500 mg L–1 NaCl (8.56 mM) solutions, respectively. The desalination efficiencies of the MnO2−1h electrode are remarkable and much greater than other MnO2-based electrodes under similar conditions (e.g., NaCl concentrations, cell voltage, etc.). This study sheds light on the significance of understanding the fundamentals of both the phase composition and crystallinity in defining the desalination performance of MnO2 electrodes.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2021
·Vol. 413
·期 19
·4887-4894
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IF 4.157
Zhang Luwei,Xin Fuli,Cai Zhixiong,Zhao Hong,Zhang Xiaolong,Yao Cuiping
Azodicarbonamide (ADA), as a dough conditioner food additive in flour, can be turned into toxic biurea and semicarbazide after high temperature processing. Hence, the using of ADA in food material should be strictly controlled, and the detection of ADA is very important for consumers’ safety and health. Herein, a simple and fast colorimetric strategy has been developed for ADA detection based on the MnO 2 nanosheets-3,3′,5,5′-tetramethylbenzidine (TMB)-glutathione (GSH) as oxidative sensing system (MnO 2 -TMB-GSH). Since the ADA can selectively react with GSH via oxidizing the sulfydryl (-SH) group of GSH to disulfide bond (S-S), which makes GSH unable to reduce MnO 2 nanosheets and restore its oxidase-like activity. The absorbance changes of the TMB solution depended on ADA content. The MnO 2 -TMB-GSH colorimetric platform can detect the ADA with a linear range of 10 μmol L −1 (11.6 ppm) to 400 μmol L −1 (464 ppm), and the limit of detection (LOD) is 3.3 μmol L −1 (3.51 ppm). Some potential interferences in real sample were tested and did not affect the MnO 2 -TMB-GSH colorimetric platform for ADA detection. Furthermore, the sensing platform was applied for detecting ADA in real flour sample with a recovery of 96%–105% (RSD < 5%). This colorimetric method can effectively and rapidly detect ADA additives in flour less than the prescribed standard (45 mg kg −1 ), which shows a great potential for visualization analysis and on-site detection of ADA in flour. Graphical abstract
A simple and fast colorimetric strategy has been developed for azodicarbonamide (ADA) detection based on the MnO 2 nanosheets-3,3′,5,5′-tetramethylbenzidine (TMB)-glutathione (GSH) as oxidative sensing system (MnO 2 -TMB-GSH).
研究领域:
食品安全
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分析化学
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生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Yu Zhang,Qing Li,Jiwei Liu,Wenbin You,Fang Fang,Min Wang,Renchao Che
The Fe2O3@C@MnO2@C (FCMC) nanocomposites containing spindle-like Fe2O3 as a core and MnO2 nanoflakes as a sandwiched shell and double carbon layers have been successfully prepared by a facile method. As anode materials of lithium ion batteries (LIBs), the cycling stability, rate performance, and conductivity of the prepared FCMC nanocomposites are far beyond those of the carbon-free Fe2O3@MnO2 (FM) nanocomposites. The hierarchical structure with double layers of carbon effectively enhances the ion conductivity and electrochemical performance of transitional metal oxides, indicating that carbon in FCMC played an important role during lithium ion storage. The initial discharge/charge capacity of the FCMC electrode reaches as high as 1240.2/1215.9 mAh g–1, and the discharge capacity is over 1000 mAh g–1 at 500 mA g–1 after 50 cycles. Additionally, the unique hierarchical structural characteristic with double layers of green carbon with a high degree of graphitization makes FCMC an excellent catalyst in removing methylene blue (MB) dye from solution with H2O2 under a slight heating with the degradation time as short as 10 min. Our work presents a new perspective on carbon modified multilayer core–shell oxide structure, which can be applied to many fields such as energy storage and catalyst.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2018
·
IF 2.179
Xiaodan Li,Wendi Zhang,Bo Chen,Gaoxiang Wu,Jiaxiang Cai,Huiqing Wu,Chunhai Jiang
Lithium‐sulfur batteries have stimulated great attention as an advanced power system for scale storage requirements due to the overwhelming energy density . However, the capacity degradation caused by polysulfide shuttle and volume expansion still impedes the practical application. Herein, we designed and fabricated a facile TiO 2 embedded sulfur bulks@MnO 2 nanosheets composite as scalable cathode for long-cyclic lithium-sulfur batteries. The TiO 2 nanoparticles were embedded in sulfur bulks, which played important roles in the coverage of the uniform MnO 2 nanosheets. The embedded TiO 2 sites and external MnO 2 nanosheets brought out the physic trapping and chemical synergistic encapsulation of polysulfides. Such a composite cathode exhibited high reversible capacity of 1289 mAh g −1 at 0.1 C and long-term cycling stability at high rate condition (430 mAh g ‐1 after 500 cycles at 2 C). This work thus sheds new light on a scalable way to improve the electrochemical performance of sulfur cathode.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Zhen Lin,Xiaotong Xiang,Kai Chen,Shuijiao Peng,Xiancai Jiang,Linxi Hou
Novel MnO 2 -doped holey carbon materials were obtained by an efficient and facile synthetic method using chitosan, potassium hydroxide and potassium permanganate as the raw materials. The carbon framework with high specific surface area was derived from chitosan by carbonization and activation approach, afterwards, MnO 2 nanorods were grown on the surface of porous carbon by one-step agitation method and the MnO 2 -doped holey carbon material was obtained. The scanning electron microscopy, energy-dispersive X-ray, transmission electron microscopy , X-ray diffraction, N 2 adsorption-desorption measurements, Raman spectroscopy and X-ray photoelectron spectroscopy were employed to analyze the physicochemical characteristics of the MnO 2 -doped holey carbon materials. The electrochemical performance of these materials displayed well through relative tests including cyclic voltammetry , galvanostatic charge-discharge, and electrochemical impedance spectroscopy measurements in 6.0 M KOH solution. Especially, this as-obtained electrode material with the optimum ratio presented a high gravimetric capacitance (460F g −1 at 0.2 A g −1 ) and exceptional capacitance reservation (91.67% at 10 A g −1 over 10,000 cycles) in the three-electrode system with 6.0 M KOH solution as the electrolyte.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
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