MOLECULES
·
2025
·Vol. 30
·期 4
·808
·
IF 4.6
Jinhai Cui,Dezhi Chen,Mengna Xie,Yongheng Zhou,Shuai Dong,Wei Wei
One method to enhance the electrochemical performance of carbon-coated Li2FeSiO4cathode material in lithium-ion batteries is to produce an ideal Li2FeSiO4precursor with minimal impurities. A novel precursor for Li2FeSiO4(Li2O·FeCO3·CH3OSiO2H) was synthesized through a methanol solvothermal reaction under stringent conditions (180 °C and 2.7 MPa), achieving a purity level of 93.2%. During synthesis, the new Li2FeSiO4precursor exhibits unique self-purification properties and maintains a fine morphology after annealing. The resulting carbon-coated Li2FeSiO4composites demonstrate a Brunauer–Emmett–Teller specific surface area of 102.4 m2/g and approximately 81% mesoporous volume, with 90% of the pore sizes measuring less than 39 nm. As a cathode material for lithium-ion batteries, this carbon-coated Li2FeSiO4exhibits initial specific capacities of 172.3 mAh/g (charge) and 159.3 mAh/g (discharge). Remarkably, nearly 50% of the theoretical specific capacity remains after 1300 cycles at a rate of 0.1 C. The excellent electrochemical performance of the carbon-coated Li2FeSiO4materials is demonstrated by their high lithium-ion diffusivity (DLi+) value of 1.26 × 10−11cm2/s. Additionally, the enormous capacities-controlled diffusion contribution, which accounts for 70% of the total diffusion at a rate of 1C, is noteworthy. This performance can be attributed to the high purity of the carbon-free Li2FeSiO4composite, which contains 91% Li2FeSiO4, as well as its favorable morphology.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yaqin Ji,Haoran Du,Kang Wang,Jian Ma,Wenjuan Yang,Xulai Yang,Zhenzhen Liu,Xin Liang,Huaxia Deng,Hongfa Xiang
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) is one of the most widely used solid electrolytes for solid-state lithium-ion batteries (SSLIBs). However, this ceramics-type solid electrolyte suffers from poor interfacial contact and impure surface phase, causing large interfacial resistance and hindering Li + transport. In this study, a binary polymer solution acting as a self-purification and surface-coordination agent, consisting of polyacrylonitrile (PAN) and poly (vinylidene fluoride-co-chlorotrifluoroethylene) (PC), are mixed with LLZTO to form a Li + -transport-enhanced solid-state composite electrolyte. PC effectively eliminates the Li 2 CO 3 impurity to form in-situ LiF coating on LLZTO particles. Simultaneously, the –CN groups in PAN establish coordination bonds with LLZTO, creating fast Li + transport channels at the polymer/ceramic interphase. In addition, the introduced flexible polymer phase enhances the interfacial contact between electrodes and electrolyte. The optimized polymer/LLZTO interphase enables the as-prepared solid-state composite electrolyte to deliver excellent electrochemical performances. The assembled quasi-solid-state Li||LiFePO 4 cells stably work at 0.5 C (1 C = 170 mA g −1 ) for >300 cycles at 60 °C and >600 cycles at room temperature, respectively. The Li||Li cell also shows a cycling life of >2000 h at 0.1 mA cm −2 and 0.1 mAh cm −2 . This strategy effectively improves Li + migration on the polymer/LLZTO interphase, providing a new approach for next-generation SSLIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2016
·
IF 4.509
Jian Lin,Dan-Dan Hu,Qian Zhang,Dong-Sheng Li,Tao Wu,Xianhui Bu,Pingyun Feng
Solid-state red phosphors of Mn2+-doped nanocrystals usually suffer from poor intensity. While the d–d emission of Mn2+ in yellow window has been extensively studied, shift toward lower energy remains challenging. Typically, intrinsic surface defects and self-purification of dopants are two obstacles for enhancing the intensity of red emission. Moreover, for red phosphors Mn2+ ions also need an appropriate host matrix and environment. Through an in situ doping strategy and optimization of the Mn2+ doping level, intense red-emitting Mn2+ dopant emission is reported here for MnCdInS@InS host. The doping strategy allows doping of Mn2+ at the core and/or surface sites of supertetrahedral “core–shell” nanocluster (Mn@MnCdInS@InS), leading to the red emission (at 643 nm) with over 40% quantum yield. Moreover, systematic control of doping level results in a series of crystalline Mn2+-doped materials with tunable photoluminescence quantum yield. In addition to the synthesis of an important class of red-emitting materials rarely obtained from Mn2+ doping, details of the physical chemistry associated with the doping process are probed with the new fundamental findings reported here.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 56
·35245-35257
·
IF 3.361
Xingqi Huang,Ting Zhao,Hongpeng Zhang,Chunxiao Yan,Jiulong Sha,Huamin Tang,Haiyan Zhu,Yue Wu
Traditional air filter papers can only filter toxic aerosols without the function of decontamination. If the poison stagnating in the paper is desorbed, it may pose a secondary threat to personnel and make it more difficult to dispose of the scrapped paper. Using an alkali-free glass fiber as the base material and zirconium hydroxide as the decontaminant, a self-decontaminating air filter paper that can degrade HD and VX simultaneously was successfully prepared by an intra-pulp addition method, with high filtration efficiency, low pressure drop and moderate tensile strength. The physicochemical properties were characterized by FE-SEM, EDX, XRD and TGA, and the results indicated that Zr(OH)4 was dispersed uniformly in the paper and filled in the interstices of the glass fiber. The preparation of the composite material had no impact on the structure of fibers and Zr(OH)4. The preparation technology of the self-decontaminating air filter paper was optimized. It was found that the paper with a fiber grammage of 50 g m−2, the adhesive of 2% and a Zr(OH)4 retention rate of 175.0 wt% could completely degrade HD and VX, whose conversion rate exceeded 99.0%, and had a tensile strength of 0.1193 kN m−1, a filtration efficiency of 99.995%, and a pressure drop of 313.6 Pa. Using GC-MS to detect the decontamination products, it was speculated that HD mainly underwent hydrolysis and elimination reactions, VX mainly underwent hydrolysis and polymerization reactions, and their products were non-toxic or low-toxic. The reaction kinetics of HD and VX on the paper was investigated and the half-lives were 2.6 h and 16.2 min, respectively, which demonstrated an outstanding degradation performance. This work manifested for the first time that the air filter paper can be optimized as an efficient self-decontaminating material, which will open up new possibilities for the design and manufacture of multifunctional protective materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yumeng Wang,Peng Zhang,Lai Lyu,Weixiang Liao,Chun Hu
Natural organic matter (NOM) has diverse negative impacts on water purification , however, preventing them occurrence very difficult. Herein, humic acid (10 mg/L), as the main component of NOM, is completely destructed within 120 min in the Fe 0 -Fe y C z /Fe x -GZIF-8-rGO air-saturated aqueous suspension without additional energy input, while its mineralization is followed by three kinetic constants within 480 min. During the process, HA was first complexed with Fe 0 -Fe y C z /Fe x -GZIF-8-rGO by π-π interaction and H-bonding interaction and cleaved to aromatic compounds and then to alkanes and alcohols with some small acids before 120 min. The electron paramagnetic resonance (EPR) analysis and density functional theory (DFT) calculations confirmed that a strongly polarized alkane-alcohol complex was formed after 150 min with an electron-rich hydroxyl group area in alcohol and an electron-poor alkane area. Moreover, the more electrons of alkane in the complex are delocalized and trapped by O 2 , with the adsorption of the alkane-alcohol complex on the catalyst surface based on the analyses of both electrochemical impedance spectroscopy (EIS) and chronoamperometry, greatly promoting the surface cleavage and hydrolytic process of alkane in the complex and producing more • OH for pollutant degradation than it does from the HA surface complex, which results in the highest mineralization rate in the period of 150–390 min. Our findings demonstrated that the current system is very promising for complex mixture-containing water purification without additional energy.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhuang Hao,Xiaojie Fang,Ziran Wang,Cong Huang,Feiran Li,Yang Luo,Yuhan Ying,Shuang Ma,Yuan Jia,Xuejun Wang,Yunlu Pan
Sweat wearable biosensors facilitate continuous monitoring of individuals’ in-depth body physiological state with real-time and molecular-level insight. However, limited detection accuracy and sensitivity resulted from insufficient amount of sweat sampling and impurities interferences still hinder their practical applications. Here, a miniature wearable skin-interfaced intelligent graphene nano-electronic (SIGN) patch employing a novel Janus membrane integrated surface wettability switchable microfluidic module with autonomous sweat sampling and purification capabilities is presented for in situ analysis of sweat biomarkers. Due to the asymmetric surface energy distribution characteristics of the microfluidic surfaces, rapid, directional transport of sufficient amount of sweat to the Janus membrane is achieved. The Janus membrane purifies the sweat sample and transport the sample to the sensing surface autonomously, thus eliminating impurities interferences and enhancing the sensing performance. An ultra-flexible bio-receptor functionalized graphene transistor for accurately monitoring sweat biomarkers such as lactate, with outstanding signal reproducibility and good long-term (over 1 month) stability, and a signal processing unit are employed incorporating with the microfluidic module. In practical wearing tests, the SIGN patch enables the continuous measuring of sweat lactate levels for volunteers during exercises and intelligently providing a preliminary diagnostic assessment on their exercise intensity successfully, suggesting its potential commercialization prospects.
研究领域:
生物医学工程
·
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Zhenjiang Fu,Guihua Liu,Tiangui Qi,Leiting Shen,Zhihong Peng,Xiaobin Li,Qiusheng Zhou,Yilin Wang
The imperative for eco-friendly and cost-efficient removal of anionic organics (surfactants) from Bayer liquor has persisted for decades. This paper proposes a novel and simple self-purification of anionic organics in Bayer liquor through trace amounts of cationic surfactants , synergistically integrated with the security filtration process in the Bayer process. Adding trace amounts of cationic surfactants (≤ 10 μmol· L −1 ) effectively compressed the cross-sectional of organics, generated the formation of ion pairs (complexes), reduced the critical micelle concentration of organics, and transformed the adsorption layer of organics from loose to dense. In addition, cationic surfactants changed the zeta potential from negative to positive in the electrical double layer of tricalcium aluminate hexahydrate (TCA) through strong physisorption . The physisorption also enhanced the surface dispersion force of TCA. Long- and double-tailed cationic surfactants were more effective in the regulation of molecular interactions than short- and single-tailed cationic surfactants. Ultimately, owing to the reduction of the repulsion among polar groups, the enhanced interaction among hydrophobic groups, as well as the reduced adsorption of OH − and Al(OH) 4 − , a dense-ordered interfacial structure of organics was subtly generated by trace amounts of cationic surfactants, contributing to the great adsorption capacity of 69.44 mg organic carbon/g. The simple and green self-purification of anionic organics in Bayer liquor is conducive to the sustainable development of the global alumina industry.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 45
·2406764
·
IF 18.5
Chunlei Zhu,Daxiong Wu,Chuan Wang,Jianmin Ma
Sodium metal batteries (SMBs) remain greatly challenging in safety and stability. Herein, a flame-retardant s designed, self-purging high-voltage electrolyte is designed to stabilize SMBs with the use of ethoxy (pentafluoro) cyclotriphosphazene (PFPN) as the electrolyte additive. PFPN can participate in the shell structure of PF 6 − ${\mathrm{PF}}_6^ - $ solvation through stronger van der Waals force to form Na 3 N, NaF-rich solid/cathode electrolyte interphase (SEI/CEI) with electronic insulation and fast ion transport. Moreover, harmful impurity (PF 5 ) also can be scavenged by van der Waals force to avoid HF production, which helps to stabilize the electrode interface. Additionally, combustion radicals (H, HO) can be cleared by van der Waals force between radical (RPO) formed by breaking with PFPN and combustion radicals for flame-retardation purpose. As expected, the high-voltage Na||Na 3 V 2 (PO 4 ) 2 O 2 F battery with modified electrolyte can deliver reservation of 92.4%, CE of 99.71% after 2000 cycles, and simultaneously possess excellent high-rate and fast charging/slow discharging performance.
研究领域:
电化学
·
能源材料
·
纳米材料
·
界面化学
·
电池安全
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Quan Zou,Xi Chen,Bingjie Li,Ruijie Zhang,Jinbin Pan,Xuejun Zhang,Xuening Zhang,Shao-Kai Sun
Contrast-enhanced magnetic resonance imaging (CE-MRI) of acute kidney injury (AKI) is severely hindered by the poor targeting capacity and potential toxicity of current contrast agents. Herein, we propose one-step fabrication of a bovine serum albumin@polydopamine@Fe (BSA@PDA@Fe, BPFe) nanoprobe with self-purification capacity for targeted CE-MRI of AKI. BSA endows the BPFe nanoprobe with renal tubule-targeting ability, and PDA is capable of completely inhibiting the intrinsic metal-induced reactive oxygen species (ROS), which are always involved in Fe/Mn-based agents. The as-prepared nanoprobe owns a tiny size of 2.7 nm, excellent solubility, good T1 MRI ability, superior biocompatibility, and powerful antioxidant capacity. In vivo CE-MRI shows that the BPFe nanoprobe can accumulate in the renal cortex due to the reabsorption effect toward the serum albumin. In the AKI model, impaired renal reabsorption function can be effortlessly detected via the diminishment of renal cortical signal enhancement. More importantly, the administration of the BPFe nanoprobe would not aggravate renal damage of AKI due to the outstanding self-purification capacity. Besides, the BPFe nanoprobe is employed for CE-MR angiography to visualize fine vessel structures. This work provides an MRI contrast agent with good biosafety and targeting ability for CE-MRI of kidney diseases.
研究领域:
医学成像
·
纳米技术
·
材料科学
·
生物医学工程
·
肾脏生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）