ChemistrySelect
·
2023
·Vol. 8
·期 42
·e202302330
·
IF 2.1
Jiawei Hu,Yang Zhang,Xiang Zhou,Jie Liu
Ni-rich transition metal oxides have high energy density and are promising cathode materials for lithium-ion batteries. However, the capacity of Li-ion batteries decays rapidly due to side reactions at the electrode-electrolyte interface with electrolyte erosion of the material. Surface modification can be used to alleviate these conditions. Here, we report the cathode material modified by ZrO 2 coating, which prevents the active material from being corroded by the electrolyte and thus can significantly inhibit the interfacial side reactions between the cathode and the electrolyte. Leveraging these advantages, ZrO 2 -coated LiNi 0.8 Co 0.15 Al 0.05 O 2 achieves 85.8 % capacity retention at 1 C rate after 100 cycles. This modification method is an important advance and is expected to be used in the research of high-performance cathode materials. Graphical We combine dry coating using a three-dimensional mixer with a high-temperature solid-phase method to prepare modified cathode materials that form a protective layer on the surface of the material. This method avoids direct exposure of the cathode material to the electrolyte, thus suppressing the side reaction between the cathode material and the electrolyte and enhancing the electrochemical performance of the material.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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DOI
高影响因子
Journal of Advanced Ceramics
·
2017
·Vol. 7
·期 1
·41-49
·
IF 1.198
Peng Le,Zhang Kuibao,He Zongsheng,Yin Dan,Xue Jiali,Xu Chen,Zhang Haibin
In this research, Zr-doped Gd 2 Ti 2 O 7 pyrochlores, with the composition of Gd 2 (Ti 1- x Zr
x
) 2 O 7 , were firstly synthesized by self-propagating high-temperature synthesis plus quick pressing (SHS/QP) using CuO as the oxidant and Ti as the reductant. To improve the radiation resistance of titanate–pyrochlore, up to 35 at% Zr was incorporated to substitute the Ti site of Gd 2 Ti 2 O 7 pyrochlore (Gd 2 (Ti 0.75 Zr 0.35 ) 2 O 7 ). XRD and SEM microstructural characterizations showed the formation of a composite ceramic with the major pyrochlore phase and the minor Cu phase. The generated temperature of samples decreased from 1702 to 1011°C with increasing Zr content. The effects of sintering temperature and pressure time on phase composition and microstructure were systematically studied. Besides, the influence of thermal transmission on the whole combustion process was also explored. The pyrochlore-based waste form possessed high bulk density of 6.25 g/cm 3 and Vickers hardness of 10.81 GPa. The MCC-1 leaching test showed the normalized elemental leaching rates (42 d) of Cu, Gd, and Zr are 1.27×10 -2 , 1.33×10 -3 , and 8.44×10 -7 g·m -2 ·d -1 , respectively.
研究领域:
材料科学
·
核废料管理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yun Zhang,Shihua Ding,Tianxiu Song,Yingchun Zhang
Temperature stable MO-ZrO 2 -Ta 2 O 5 ceramics (M = Co, Ni) were prepared by solid state route. Crystal structure was determined by X-ray diffraction and Raman spectrum. Single-phase MZrTa 2 O 8 was formed through the reaction between intermediate MTa 2 O 6 and residual ZrO 2 . Quantitative phase analysis verified that changing temperature considerably adjusted the chemical compositions of ceramics. In the case of CoZrTa 2 O 8 , the optimum dielectric properties were ε r ∼24.3, Q × f∼ 95,300 GHz ( Q ∼11,305 at 8.43 GHz), and τ f ∼ -30.50 ppm/°C. The NiZrTa 2 O 8 ceramic had ε r = 23.5, Q × f = 86,404 GHz ( Q ∼10,774 at 8.02 GHz), and τ f = −20.20 ppm/°C. Their large τ f values were compensated since MZrTa 2 O 8 and MTa 2 O 6 had opposite τ f . Particularly, near zero τ f of −2.67 and 0.22 ppm/°C were obtained for M = Co, Ni at 1150 and 1175 °C, respectively.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
Materials Today Nano
·
2022
·
IF 13.364
X.L. Zhang,X. Zhang,L.C. Zhang,Z.G. Huang,F. Fang,J.J. Hu,Y.X. Yang,M.X. Gao,H.G. Pan,Y.F. Liu
Transition metal catalysts are particularly effective in improving the reaction kinetics of light metal hydrides for reversible hydrogen storage . Herein, tetragonal ZrO 2 hierarchical nanoparticles (nano-ZrO 2 ) composed of primary particles of ∼4 nm in diameter are successfully synthesized by a facile one-pot solvothermal process. The unique hierarchical structure features homogeneous distributions of in situ formed multivalent Zr-based species, which allow superior catalytic activity for hydrogen storage in MgH 2 . The MgH 2 +10 wt% nano-ZrO 2 starts releasing H 2 at 163 °C after one activation, which is 107 °C lower than additive-free MgH 2 , and 50 °C lower than that of bulk ZrO 2 -doped MgH 2 . At 230 °C, 5.9 wt% of H is rapidly liberated within 20 min from the nano-ZrO 2 -containing MgH 2 . More importantly, the material shows superior hydrogenation kinetics compared with all reported catalyst-modified MgH 2 . The nano-ZrO 2 -containing Mg took up 4.0 wt% of H in only 12 s at 100 °C under 50 bar H 2 , 400 times faster than the bulk-ZrO 2 -modified sample. Even at 50 °C, approximately 1.8 wt% H was absorbed within 1 min. Our findings provide useful insights into the design and development of high-performance catalysts toward solid-state hydrogen storage materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Dewen Sima,Haojin Wu,Koukou Tian,Shijun Xie,Joel Jie Foo,Shuirong Li,Duo Wang,Yueyuan Ye,Zhifeng Zheng,Yun-Quan Liu
Ammonia decomposition is an effective way for high purity hydrogen production , yet the increase of catalytic activity at low temperatures remains a big challenge for this process. In this paper, a CeO 2 –ZrO 2 composite with Al as the secondary dopant was synthesized by the co-precipitation method, which was used as the carrier of nickel metal for ammonia decomposition. The experimental results showed that an obvious increase in catalytic activity of the ammonia decomposition at the relatively low temperature range of 450–550 °C was achieved over the nickel catalyst with CeO 2 –ZrO 2 composite as the metal carrier. Specifically, the complete decomposition of ammonia was achieved at 580 °C for Ni/Al–Ce 0.8 Zr 0.2 O 2 catalyst, while only 92% of ammonia was decomposed at 600 °C over the reference Ni/Al 2 O 3 catalyst. The characterization results indicated that the introduction of Al as the secondary dopant of ceria not only increases the specific surface area and oxygen defects on the surface, but also enhances the nickel metal dispersion and metal-support interaction, thus enhances the catalytic performance of Ni/Al–Ce 0.8 Zr 0.2 O 2 catalyst in the ammonia decomposition.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 19
·2640
·
IF 5.3
Yuqing Xiao,Huijie Zhang,Yue Zhao,Pei Liu,Kiran Kumar Kondamareddy,Changlei Wang
Carbon-based perovskite solar cells (C-PSCs) have the impressive characteristics of good stability and potential commercialization. The insulating layers play crucial roles in charge modulation at the buried perovskite interface in mesoporous C-PSCs. In this work, the effects of three different tunnel oxide layers on the performance of air-processed C-PSCs are scrutinized to unveil the passivating quality. Devices with ZrO2-passivated TiO2electron contacts exhibit higher power conversion efficiencies (PCEs) than their Al2O3and SiO2counterparts. The porous feature and robust chemical properties of ZrO2ensure the high quality of the perovskite absorber, thus ensuring the high repeatability of our devices. An efficiency level of 14.96% puts our device among the state-of-the-art hole-conductor-free C-PSCs, and our unencapsulated device maintains 88.9% of its initial performance after 11,520 h (480 days) of ambient storage. These results demonstrate that the function of tunnel oxides at the perovskite/electron contact interface is important to manipulate the charge transfer dynamics that critically affect the performance and stability of C-PSCs.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 8
·3138
·
IF 3.4
Bing Zhang,Ruohan Xia,Yao Yan,Jia Liu,Zisheng Guan
To improve the efficacy of polymer-based substrate hybrid coatings, it is essential to simultaneously optimize mechanical strength and preserve the optical properties. In this study, a mixture of zirconium oxide (ZrO2) sol and methyltriethoxysilane modified silica (SiO2) sol-gel was dip-coated onto polycarbonate (PC) substrates to form zirconia-enhanced SiO2hybrid coatings. Additionally, a solution containing 1H, 1H, 2H, and 2H-perfluorooctyl trichlorosilane (PFTS) was employed for surface modification. The results show that the ZrO2-SiO2hybrid coating enhanced the mechanical strength and transmittance. The average transmittance of the coated PC reached up to 93.9% (400–800 nm), while the peak transmittance reached up to 95.1% at 700 nm. SEM images and AFM morphologies demonstrate that the ZrO2and SiO2nanoparticles were evenly distributed, and a flat coating was observed on the PC substrate. The PFTS-modified ZrO2-SiO2hybrid coating also exhibited good hydrophobicity (WCA, 113°). As an antireflective coating on PC, with self-cleaning capability, the proposed coating has application prospects in optical lenses and automotive windows.Keywords:ZrO2-SiO2hybrid coating;hydrophobicity;antireflective;polycarbonate substrates
研究领域:
材料科学
·
表面工程
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Yiting Cai,Zheqi Chen,Yang Gao,Jiali Tang,Jie Mao,Dan Wang,Jian-Feng Chen,Yingwu Luo
Dielectric elastomer is a kind of attractive artificial muscle with fast and reversible deformation excited by applied voltages . Typical dielectric elastomers suffer from low dielectric breakdown strength , which limits the achievable electro-actuation performance. We report that the introduction of surface-modified ZrO 2 nanoparticles in dielectric elastomer (poly(styrene- b -butyl acrylate- b -styrene)) can significantly increase the dielectric breakdown strength. We highlight that the surface modifier molecules for ZrO 2 nanoparticles should be designed to have an oligomeric chain compatible with the elastomer matrix to relieve the entropy loss of the elastomer chains. Thus, good dispersion of the nanoparticles can be achieved and the modulus is mildly increased. As a result, the maximum electro-actuation area strain is increased by a factor of 2.0 (from 19.1% to 37.8%), and the maximum energy density by a factor of 9.2 (from 5.96 kJ/m 3 to 55.15 kJ/m 3 ) by adding 1.7 vol% ZrO 2 of 8 nm.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Hongwei Chu,Mingjie Xu,Benxue Liu,Zhongben Pan,Han Pan,Shengzhi Zhao,Dong Xu,Dechun Li
Amorphous oxides have unique physicochemical properties with extensive opto-electronic applications such as the thin-film transistor, light-emitting diode backplanes, and supercontinuum generation. In this contribution, we synthesize the amorphous ZrO 2 /SiO 2 nanoporous aerogel with high structural integrity. With the femtosecond excitation laser at 800–1,064 nm, the broadband second harmonic generation is observed. The nonlinear optical properties of the as-prepared ZrO 2 /SiO 2 aerogel are investigated at 1.0 μm and 1.5 μm for the first time. Subsequently, the amorphous ZrO 2 /SiO 2 saturable absorber is originally applied in the Yb-doped and Er-doped fiber lasers to realize the mode-locking operations. In the Yb-doped fiber laser, the dissipative soliton resonance mode-locking operation is demonstrated with the largest pulse duration of 22 ns at a repetition rate of 7.8 MHz and a high signal-to-noise ratio of 64 dB. In the Er-doped fiber laser, a conventional soliton mod-locking regime is observed with an ultrashort pulse width of 960 fs, a repetition frequency of 6.55 MHz, and a time-bandwidth production of 0.347. Our work shows the good ability of the ZrO 2 /SiO 2 aerogel in generating ultrafast pulses and extends the saturable absorber into the amorphous material realm.
研究领域:
材料科学
·
光学工程
·
物理学
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Xi-Ming Wang,Zhi-Yong Guo,Yue Zhang,Ming-Li Chen,Jian-Hua Wang
Fe x O y and ZrO 2 nanoparticles co-doped layered porous polyimide , polyimide-Fe x O y -ZrO 2 is prepared with a one-step strategy, shortly termed as PI-Fe x O y -ZrO 2 . The layered and porous structure of the polymer offers a supported platform for metallic oxide anchoring, exhibiting a mesopore size of 3.93 nm and providing a surface area of 198.47 m 2 g −1 . The metallic oxides were uniformly and highly dispersed in the PI-Fe x O y -ZrO 2 nanocomposite with percentages of 15.81 and 20.53 wt% for Fe and Zr, respectively. The magnetic Fe x O y provides driving force for rapid separation. The high doping of ZrO 2 facilitates effective enrichment of phosphopeptides, even at a very low mass ratio of 1:1000 for tryptic digest of phosphopeptides/non-phosphopeptides, e.g., β-casein/BSA in this particular case. In addition, the PI-Fe x O y -ZrO 2 nanocomposite exhibits better adsorption performance to phosphopeptides with respect to commercial titanium dioxide nanoparticles . The effectiveness of low-abundant phosphopeptides isolation and enrichment from human serum is further identified and demonstrated by means of MALDI-TOF MS and LC-ESI-MS/MS.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Xiaonong Wang,Liping Liu,Xiaoping Wang,Xiujun Bai,Jingu Qin,Xiaoxia Li,Bin Wang
Lightweight absorbers with effective broad absorption and high thermal stability are highly desirable in the field of electromagnetic wave absorption. In this work, we introduce a facile carbon thermal shock method to prepare ZrO 2 /C composites using UIO 66 (Zr) as the precursor. The instant heating and cooling process ensures the uniform deposition of nano-sized ZrO 2 ( ca . 5–15 nm) on graphene, exhibiting an ultrahigh interfacial number density of ca. 10 15 m −2 that favors polarization loss. Due to the synergetic effect of dielectric loss and impedance matching, the prepared ZrO 2 /graphene composites show tunable wide-microwave absorption performance by adjusting the heat temperature, and possess a wide absorption band covering the entire X and Ku band. Notably, the ZrO 2 /graphene composites show high thermal stability up to 1000 °C, which presents great potential for microwave absorption applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Leyi He,Yaoxia Li,Lulu Chen,Xiuli Wang,Jia Guo,Changchun Wang
Due to the diverse roles of nucleoside analogues in biological processes, their coexistence often complicates drug therapeutic effect and disease diagnosis, then effective separation of nucleoside analogues becomes extremely important. However, the separation of nucleoside analogues remains challenging. Herein, we combined the metal oxide affinity technology with solid-phase extraction by depositing ZrO2-nanoparticles on the PS@PAA microspheres to form a type of functional composite, and the selective adsorption of adenosine (Ado), adenosine-5′-monophosphate (AMP) and deoxyadenosine (dA) was achieved by exploiting their differential interactions with the hybrid microspheres, reaching selectivity coefficients of α(AMP/Ado) = 23.73 and α(Ado/dA) = 10.14 under optimized conditions. Mechanism investigation shows that this selectivity is mainly caused by the coordination of Zr(IV) with diol and phosphate groups in Ado, AMP and dA. Meanwhile, the hydrogen bonding is also an important parameter for the selectivity coefficients of the nucleoside analogues. Based on these, a versatile adsorption-elution protocol was established and successfully applied to the effective separation of adenosine analogues from mixed samples. This work thus provides a facile and effective strategy for the separation of structural analogues.
✓ 已验证
DOI
PubMed
高影响因子
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