纳米Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)固溶体微观光谱特征及氧化还原性能研究

采用水热法合成Fe^(3+)、Al^(3+)、Co^(2+)及La^(3+)共掺杂纳米Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)(x=0.00~0.05)固溶体,利用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、紫外吸收光谱(UV)、荧光光谱(PL)、拉曼光谱(Raman)以及与H2的程序升温还原反应(TPR)等方法对固溶体的微观结构、形貌、光谱特征和氧化还原活性进行系统表征及分析。XRD结果表明,Ce_(1-4x)(FeAlCoLa)_(x)O_(2-δ)固溶体均呈CeO_(2)立方萤石结构,当掺杂量增加到x=0.04时,在36.6°处出现了微弱的Co_(3)O_(4)杂相,可以确定掺杂离子在CeO_(2)晶格中的固溶度x<0.04。样品的(111)衍射峰位向高角度偏移,表明掺杂离子引起晶格发生畸变。TEM及SEM结果显示样品为球形纳米颗粒,掺杂离子引起晶面间距变小。紫外吸收光谱表明,与纯CeO_(2)相比,掺杂样品的吸收边逐渐红移,在560~780 nm范围观察到掺杂离子的紫外吸收峰。掺杂引起样品能隙降低,从2.84 eV(纯CeO_(2))逐渐降低至2.10 eV(x=0.05)。其原因可归结为掺杂离子在CeO_(2)的价带和导带之间形成新的杂质能级,允许电子从价带跃迁到较低的杂质能级上,继而降低了跃迁能隙。由于掺杂离子引起晶格内部发生畸变以及氧空位比例增大,阻碍了电子的高能跃迁,也可引起能隙减小。荧光光谱证明,掺杂样品的发射峰强度明显降低。Raman光谱表明,掺杂引起F_(2g)峰位发生偏移,峰强减小,峰宽变大。同时,对应于氧空位峰的相对强度逐渐提高。荧光光谱及Raman光谱均证明掺杂离子引起固溶体晶格畸变程度增加,氧空位浓度提高。H_(2)-TPR测试表明,掺杂可以有效降低CeO_(2)的氧化还原反应温度,提高氧化还原活性,当x=0.03的样品表面还原温度最低,还原峰的面积最大,即氧化还原反应活性最佳,表明样品的氧化还原性能与晶粒尺寸、晶格缺陷及氧空位浓度密切相关。通过以上研究证明,四种离子共掺杂CeO_(2)能够有效修饰微观晶体结构,在较低掺杂浓度下即可显著改善样品的催化活性。

重组干扰素α-2b雾化对毛细支气管炎患儿炎症因子及血清MMP-9、TLR4、TGF-β_(1)的影响

目的:探讨重组干扰素α-2b雾化对毛细支气管炎患儿炎症因子及血清基质金属蛋白酶9(MMP-9)、Toll样受体4(TLR4)、转化生长因子β_(1)(TGF-β_(1))的影响。方法:选取2020年1月—2022年6月在汉川市妇幼保健院诊治的118例毛细支气管炎患儿为研究对象,采用随机数表法将其分为对照组(n=59)和研究组(n=59)。对照组给予常规治疗,研究组在常规治疗的基础上给予重组干扰素α-2b雾化治疗。比较两组治疗前后的炎症因子及血清MMP-9、TLR4、TGF-β_(1)水平。结果:治疗后两组白细胞介素-4(IL-4)、MMP-9、TLR4、TGF-β_(1)水平较治疗前均降低,白细胞介素-10(IL-10)、干扰素γ(IFN-γ)水平较治疗前均升高,研究组IL-4、MMP-9、TLR4、TGF-β_(1)水平均低于对照组,IL-10、IFN-γ水平均高于对照组,差异有统计学意义(P<0.05)。研究组的治疗总有效率明显高于对照组,差异有统计学意义(P<0.05)。结论:重组干扰素α-2b雾化辅助治疗毛细支气管炎患儿,可有效改善炎症因子,降低血清MMP-9、TLR4、TGF-β_(1),疗效显著。

LiTi_(2)(PO_(4))_(3)修饰高镍单晶三元正极材料增强结构稳定性

单晶LiNi_(1-x-y)Co_(x)Mn_(y)O_(2)(SCNCM,1-x-y>0.9)正极材料由于其特殊的晶体结构,与多晶NCM材料相比,具有更优越的循环寿命。然而,SCNCM在长循环过程中由于严重的副反应和不可逆相变,导致严重的容量退化。具有较高扩散系数的LiTi_(2)(PO_(4))_(3)(LTP)可以增强Li^(+)在电极和电解质之间的传递,并防止与空气和电解质的副反应。为了优化SCNCM的电化学性能,采用液相混合和固相烧结相结合的方法对其进行表面包覆,提高单晶SCNCM循环性能。X射线衍射(XRD)和高分辨透射电子显微镜(HRTEM)结果证实,SCNCM表面包覆一层30~50 nm的LTP涂层,改性后的样品在长循环后仍然可以保持良好的层状结构。具体地说,包覆0.8%(质量分数)LTP的SCNCM正极在0.5 C循环100圈后,放电比容量为151.2 mAh/g。

Thermodynamic equilibrium theory-guided design and synthesis of Mg-doped LiFe_(0.4)Mn_(0.6)PO_(4)/C cathode for lithium-ion batteries

Mn-rich LiFe_(1-x)Mn_(x)PO_(4)(x>0.5),which combines the high operation voltage of LiMnPO_(4)with excellent rate performa nce of LiFePO4,is hindered by its sluggish kinetic properties.Herein,thermodynamic equilibrium analysis of Mn^(2+)-Fe^(2+)-Mg^(2+)-C_(2)O_(4)^(2-)-H_(2)O system is used to guide the design and preparation of insitu Mg-doped(Fe_(0.4)Mn_(0.6))_(1-x)Mg_(x)C_(2)O_(4)intermediate,which is then employed as an innovative precursor to synthesize high-performance Mg-doped LiFe_(0.4)Mn_(0.6)PO_(4).It indicates that the metal ions with a high precipitation efficiency and the stoichiometric precursors with uniform element distribution can be achieved under the optimized thermodynamic conditions.Meanwhile,accelerated Li+diffusivity and reduced charge transfer resistance originating from Mg doping are verified by various kinetic characterizations.Benefiting from the contributions of inherited homogeneous element distribution,small particle size,uniform carbon layer coating,enhanced Li+migration ability and structural stability induced by Mg doping,the Li(Fe_(0.4)Mn_(0.6))_(0.97)Mg_(0.03)PO_(4)/C exhibits splendid electrochemical performance.

A Novel Way to Prepareγ-A1_2O_3 Supported SO_4^(2-)/ZrO_2 Solid Superacid Catalysts for n-Butane Isomerization

Highly active solid superacid catalysts for n-butane isomerization, SZ/A1_2O_3-P, were prepared by supporting SO-(4-2)/ZrO2, (SZ) on y-A1_2O_3 carrier using a precipitation method. The activities of some catalysts were enhanced significantly j The activity of the most active sample. 60%SZ/Al_2O3-P, was even about 2 times more active than that of the SZ catalyst.

姜黄素影响Aβ_(25-35)诱导PC12细胞周期变化与细胞凋亡的可能机制

目的探讨姜黄素(curcum in,Cur)对β-淀粉样肽(25-35)[β-amyloidpeptide-(25-35),Aβ25-35]诱导体外血清饥饿培养的PC12细胞周期异常与凋亡保护作用的可能机制。方法5μmol.L-1Cur预处理同步于G0期的PC12细胞,加入终浓度为25μmol.L-1Aβ25-35处理0～20h,用RT-PCR和Western blot从mRNA及蛋白水平检测p21、CDK4、E2F1、bax的表达。结果与Aβ25-35诱导组比较,Cur保护组p21mRNA和p21蛋白的表达增加;CDK4、E2F1、baxmRNA和CDK4、Bax蛋白的表达降低。结论Cur可能通过上调p21的表达,下调CDK4、E2F1、bax的表达,对Aβ25-35诱导的PC12细胞周期异常与凋亡起保护作用。

固态电解质Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)中Li+的迁移特性

Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)是一种颇具前景的NASICON型锂离子固态电解质.本文通过第一性原理计算研究了不同Al掺杂浓度(x=0.00,0.16,0.33,0.50)对LATP的结构特性、电学特性以及Li^(+)迁移特性的影响.结果表明,Al能够稳定掺杂进入LiTi2(PO4)3(LTP)的晶体结构当中.当Al掺杂浓度x=0.16时,Li—O键的平均键长最长,成键强度最弱,而Ti—O键强度随Al掺杂浓度变化不大.Al掺杂浓度对LATP带隙的影响不大,但Al附近的O原子聚集了更多的负电荷,形成AlO6极化中心.Li^(+)不同的迁移方式(空位迁移、间隙位迁移和协同迁移)在Al掺杂浓度不同时展现出复杂的能垒变化,Li^(+)在空位迁移中迁移势垒随Al掺杂浓度的增大而升高,而在间隙位迁移中Li^(+)的迁移势垒变化相反,由于协同迁移中涉及空位和间隙位两种位点,Li^(+)的迁移势垒表现为随Al掺杂浓度的升高先降低后升高的复杂变化.当x=0.50时,LATP具有最低的Li^(+)迁移势垒0.342 eV,这个势垒值是间隙位迁移的结果.因此,通过改变Al掺杂浓度,可改变间隙Li^(+)浓度及迁移通道结构,进而调节Li^(+)的迁移性能,提高LATP中的Li^(+)导电性能.

Cu_(2)Zn(Sn_(1-x)Ge_(x))(S,Se)_(4)太阳能电池的制备和表征

采用简单的溶胶-凝胶法制备了高质量的Cu_(2)Zn(Sn_(1-x)Ge_(x))(S,Se)_(4)(CZTGSSe)前驱体薄膜.在500℃下进行17 min的硒化,得到了高质量的CZTGSSe薄膜.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见分光光度计(UV-Vis)等研究了CZTGSSe薄膜的物理化学性质.实验结果表明,利用在CZTSSe吸收层中掺杂Ge的方法可以得到较高的迁移率和光电转换效率(PCE).与Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)太阳能电池相比,观察到5%-CZTGSSe太阳能电池的开路电压(V_(oc))增加了104 mV,PCE也从3.14%增加到5.28%.因此,在CZTSSe层中掺杂Ge不仅是一种可以获得具有较高V_(oc)和PCE的CZTSSe基太阳能电池的方法,也是一种可以促进晶粒生长、提高薄膜质量的有效途径.

An automated approach to calculating the maximum diameters of multiple cutters and their paths for sectional milling of centrifugal impellers on a 4_(1/2)-axis CNC machine

Power generators and chemical engineering compressors include heavy and large centrifugal impellers. To produce these impellers in high-speed machining, a 4?-axis milling machine(or a 4-axis machine plus an indexing table) is often used in the industry, which is more rigid than a5-axis milling machine. Since impeller blades are designed with complex B-spline surfaces and impeller channels spaces vary significantly, it is more efficient to use multiple cutters as large as possible to cut a channel in sections and a blade surface in patches, instead of only using a small cutter to machine a whole blade and a channel. Unfortunately, no approach has been established to automatically calculate the largest diameters of cutters and their paths, which include the indexing table angles. To address this problem, an automated and optimization approach is proposed. Based on the structure of a 4?-axis machine, a geometric model for a cutter gouging/interfering the impeller is formulated, and an optimization model of the cutter diameter in terms of the indexing table angle is established at a cutter contact(CC) point on a blade surface. Then, the diameters of the tools,their orientations, and the indexing table angles are optimized, and each tool's paths are generated for machining its corresponding impeller section. As a test, an impeller is efficiently machined with these tools section by section; thus, this approach is valid. It can be directly used in the industry to improve efficiency of machining centrifugal impellers.

Crystal structure,chemical bond characteristics,infrared reflection spectrum,and microwave dielectric properties of Nd_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9) ceramics

Microwave dielectric ceramics(MWDCs)with low dielectric constant and low dielectric loss are desired in contemporary society,where the communication frequency is developing to high frequency(sub-6G).Herein,Nd_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9)(NZ_(1−x)T_(x)M,x=0.02-0.10)ceramics were prepared through a solid-phase process.According to X-ray diffraction(XRD)patterns,the ceramics could form a pure crystal structure with the R3c(167)space group.The internal parameters affecting the properties of the ceramics were calculated and analyzed by employing Clausius-Mossotti relationship,Shannon’s rule,and Phillips-van Vechten-Levine(P-V-L)theory.Furthermore,theoretical dielectric loss of the ceramics was measured and analyzed by a Fourier transform infrared(IR)radiation spectrometer.Notably,when x=0.08 and sintered at 700℃,optimal microwave dielectric properties of the ceramics were obtained,including a dielectric constant(ε_(r))=10.94,Q·f=82,525 GHz(at 9.62 GHz),and near-zero resonant frequency temperature coefficient(τ_(f))=−12.99 ppm/℃.This study not only obtained an MWDC with excellent properties but also deeply analyzed the effects of Ti^(4+)on the microwave dielectric properties and chemical bond characteristics of Nd_(2)Zr_(3)(MoO_(4))_(9)(NZM),which laid a solid foundation for the development of rare-earth molybdate MWDC system.

Crystal structure and enhanced microwave dielectric properties of the Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9) ceramics at microwave frequency

Dense microwave dielectric ceramics of Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9)(CZMAT) (x = 0.02–0.10) were prepared by the conventional solid-state route. The effects of (Al1/2Ta1/2)^(4+) on their microstructures, sintering behaviors, and microwave dielectric properties were systematically investigated. On the basis of the X-ray diffraction (XRD) results, all the samples were matched well with Pr_(2)Zr_(3)(MoO_(4))_(9) structures, which belonged to the space group R3¯c. The lattice parameters were obtained using the Rietveld refinement method. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by using the Phillips—Van Vechten—Levine (P—V—L) theory. Excellent dielectric properties of Ce_(2)[Zr_(0.94)(Al_(1/2)Ta_(1/2))_(0.06)]_(3)(MoO_(4))_(9) with a relative permittivity (ε_(r)) of 10.46, quality factor (Q × f) of 83,796 GHz, and temperature coefficient of resonant frequency (τ_(f)) of −11.50 ppm/℃ were achieved at 850 ℃.

Structure characteristics and microwave dielectric properties of Pr_(2)(Zr_(1-x)Ti_(x))_(3)(MoO_(4))_(9) solid solution ceramic with a stable temperature coefficient

Pr_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9)(x=0.1-1.0)ceramics were prepared via a conventional solid-state method,the dependence of crystal structure and bond characteristics on microwave dielectric properties was investigated systemically.The X-ray diffraction patterns indicated that the single-phase Pr_(2)Zr_(3)(MoO_(4))_(9)structure was formed in all the specimens.As the Ti^(4+)content increased,the lattice volume gradually decreased,which was ascribed to the fact that the ionic radius of Ti^(4+)was smaller than that of Zr^(4+).Notably,outstanding microwave dielectric properties withεr of 10.73-16.35,Q·f values of 80,696-18,726 GHz and minorτ_(f) values−14.1-−2.6 ppm/℃were achieved in Pr_(2)(Zr_(1−x)Ti_(x))_(3)(MoO_(4))_(9)ceramics.Theε_(r) increased with the rising x values,which was associated with the increase ofα/Vm values.The decreasing Q·f was affected by the decline of lattice energy of[Zr/TiO_(6)]octahedral.Theτf value was dominated by[Zr/TiO_(6)]octahedral distortion,Mo-O bond energy,bond strength and B-site bond valence.Furthermore,infrared reflection spectra suggested that the properties were mainly caused by the absorption of phonon,and the dielectric loss could be further reduced by optimizing the experimental process.

Progress and perspective of Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3) ceramic electrolyte in lithium batteries

The replacement of liquid organic electrolytes with solid-state electrolytes(SSEs)is a feasible way to solve the safety issues and improve the energy density of lithium batteries.Developing SSEs materials that can well match with high-voltage cathodes and lithium metal anode is quite significant to develop high-energy-density lithium batteries.Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)SSE with NASICON structure exhibits high ionic conductivity,low cost and superior air stability,which enable it as one of the most hopeful candidates for all-solidstate batteries(ASSBs).However,the high interfacial impedance between LATP and electrodes,and the severe interfacial side reactions with the lithium metal greatly limit its applications in ASSBs.This review introduces the crystal structure and ion transport mechanisms of LATP and summarizes the key factors affecting the ionic conductivity.The side reaction mechanisms of LATP with Li metal and the promising strategies for optimizing interfacial compatibility are reviewed.We also summarize the applications of LATP including as surface coatings of cathode particles,ion transport network additives and inorganic fillers of composite polymer electrolytes.At last,this review proposes the challenges and the future development directions of LATP in SSBs.

Copper(Ⅱ)-Catalyzed Synthesis of N-Substituted-3-amino-4- cyano-isoquinoline-1(2H)-ones by the Reaction of N-Substituted-2-iodobenzamides with Malononitrile

A novel Cu(OAc)_(2)•H_(2)O catalyzed coupling reaction of N-substituted-2-iodobenzamides with malononitrile to afford N-substituted-3-amino-4-cyano-isoquinoline-1(2H)-ones is described.The reaction proceeded in DMSO at 90℃ for 5 h in nitrogen without external ligands.

穿山龙总皂苷调控巨噬细胞M1/M2极化治疗痛风性关节炎的作用机制

目的:阐明巨噬细胞M1/M2极化在尿酸钠晶体诱导大鼠痛风性关节炎(GA)模型中的作用,揭示穿山龙总皂苷治疗GA的抗炎分子机制。方法:雄性SD大鼠72只,随机分为4组,分别为正常组、模型组、穿山龙总皂苷组(160 mg·kg^(-1)),塞来昔布组(43.3 mg·kg^(-1)),每组18只。采用单尿酸钠晶体双侧注射大鼠踝关节方法建立大鼠GA模型。苏木素-伊红(HE)染色观察大鼠踝关节滑膜组织病理学改变。免疫组化法检测踝关节滑膜组织CD68,白细胞介素-4(IL-4),诱导型一氧化氮合酶(iNOS)和转化生长因子-β_(1)(TGF-β_(1))蛋白表达的变化。结果:HE染色结果显示模型组造模后第3天炎症最为明显,疾病处于急性期。第5天炎症有所缓解,第8天仍有炎症表现但接近正常组。穿山龙总皂苷组和塞来昔布组均可改善滑膜组织病理表现,穿山龙总皂苷组效果更为明显。免疫组化结果显示,与正常组比较,给药3 d,5 d和8 d时模型组CD68和iNOS表达显著升高(P<0.01);与模型组比较,给药3 d时穿山龙总皂苷可明显降低CD68和iNOS表达(P<0.05,P<0.01),给药5 d和8 d时穿山龙总皂苷可显著降低CD68和iNOS表达(P<0.01)。与正常组比较,给药3 d时,模型组IL-4和TGF-β_(1)表达显著升高(P<0.01),给药5 d和8 d时,模型组IL-4表达显著降低(P<0.01),给药5 d时,模型组TGF-β_(1)表达显著降低(P<0.01);与模型组比较,给药5 d和8 d时,穿山龙总皂苷可显著升高IL-4和TGF-β_(1)表达(P<0.01)。结论:穿山龙总皂苷可通过调控巨噬细胞M1/M2极化对GA发挥潜在治疗效果。

关于PTC陶瓷发热材料的研制

制成性能优良的以ＢａＴ_ｉＯ_３为基的ＰＴＣ陶瓷体是全课题的主要任务。本文独立地给出了用化学共沉淀方法研制Ｂａ_（１－ｘ）Ｓｒ_ｘＴ_ｉＯ_３基ＰＴＣ陶瓷的化学反应方程式，阐述了制备低烧结温度、高性能的热敏陶瓷材料的过程和方法，并对某些关键问题进行了讨论。

创面愈合过程中创缘表皮干细胞的再分布

目的:研究皮肤干细胞在全层皮肤创面愈合过程中的分布与增殖分化特征,以及该特征在创面愈合过程中的作用。方法:10只Wistar大鼠背部各制备4个面积为2.54cm^2的全层皮肤创面,将创面随机分为2组,即银锌霜治疗组(20个创面),空白对照组(20个创面)。分别于伤后3d、1周、2周和3周以组织学检查动态观察各组治疗效果,并以β_1整合素、角蛋白19(K19)免疫组化法检测表皮干细胞在创面愈合过程中的表达情况。结果:两面创面愈合率为银锌霜组80%(16/20)。两组创面肉芽组织于各时相点均未见β_1整合素、K19阳性细胞出现,但于创缘表皮的层或颗粒层出现了散在的β_1整合和K19同时染色阳性细胞。且越接近创面这些阳性细胞越密集,组织学上与基底层的阳性细胞无直接联系,其数量随着创面的缩小渐渐增加,直到创面愈合。上皮化后,这些阳性细胞逐渐减少,并随着愈合创面表皮脚的出现而消失,而感染创面的阳性细胞数量明显少于未感染创面的阳性细胞数。结论:表皮干细胞能动地与创面的修复,创缘表皮干细胞再分布的主要功能可能促进创面再上皮化。

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Although aqueous zinc-ion batteries have gained great development due to their many merits,the frozen aqueous electrolyte hinders their practical application at low temperature conditions.Here,the synergistic e ect of cation and anion to break the hydrogen-bonds network of original water molecules is demonstrated by multi-perspective characterization.Then,an aqueous-salt hydrates deep eutectic solvent of 3.5 M Mg(ClO_(4))_(2)+1 M Zn(ClO_(4))_(2)is proposed and displays an ultralow freezing point of-121℃.A high ionic conductivity of 1.41 mS cm-1 and low viscosity of 22.9 mPa s at-70℃ imply a fast ions transport behavior of this electrolyte.With the benefits of the low-temperature electrolyte,the fabricated Zn||Pyrene-4,5,9,10-tetraone(PTO)and Zn||Phenazine(PNZ)batteries exhibit satisfactory low-temperature performance.For example,Zn||PTO battery shows a high discharge capacity of 101.5 mAh g^(-1)at 0.5 C(200 mA g^(-1))and 71 mAh g^(-1)at 3C(1.2 A g^(-1))when the temperature drops to-70℃.This work provides an unique view to design anti-freezing aqueous electrolyte.

陶瓷-聚合物复合固态电解质膜的制备与性能研究

NASICON型快离子导体Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)具有较高的离子电导率、较宽的电化学窗口及良好的水和空气稳定性,但其界面接触性能差。石榴石型Li_(7)La_(3)Zr_(2)O_(12)(LLZO)锂离子电导率高、电化学窗口较宽且热稳定性好,但其立方相结构不稳定,影响其实际应用。采用溶液浇筑法,制备纯PVDF-LiTFSI电解质膜和以PVDF为基、3种不同质量比的Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)和Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)的固态电解质膜,并探讨纯PVDF-LiTFSI电解质膜和3种不同质量比的活性无机电解质填料对复合固态电解质离子电导率的影响。结果表明,Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)和Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)质量比为1∶1时,电解质膜的XRD图谱的衍射峰比纯PVDF-LiTFSI下降更为明显,电化学窗口为3.9 V左右,表现出更好的稳定性。在不同温度下分别测量其离子电导率发现,Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)和Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)质量比为1∶1时的电解质膜均高于纯PVDF-LiTFSI电解质膜和Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)和Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)质量比为2∶1和3∶1时的电解质膜。将其装配成电池后发现,0.1C下电池首次充放电比容量分别为90 m A·h/g和87 m A·h/g。以0.5C的电流循环25圈,放电比容量从57 mA·h/g衰减至51mA·h/g,容量保持率为99.7%。所以,以PVDF为基、Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)和Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)质量比为1∶1的固态电解质膜有优良的倍率性能和循环稳定性能。

Preparation of 1-amidoalkyl-2-naphthol derivatives using barium phosphate nano-powders

Barium phosphate（Ba_3（PO_4）_2） nano-powder was successfully synthesized via a simple precipitation route without any surfactant. The prepared nano-powder was applied for the facile synthesis of 1-amidoalkyl-2-naphthol derivatives using multi-component reaction of aldehydes, 2-naphthol and an amide（or urea） in high yields.