High ionic conductivity and superior interfacial stability of solid electrolytes at the electrodes are crucial factors for high-performance all-solid-state sodium batteries. Herein, a composite solid electrolyte Na3PS...High ionic conductivity and superior interfacial stability of solid electrolytes at the electrodes are crucial factors for high-performance all-solid-state sodium batteries. Herein, a composite solid electrolyte Na3PS4-polyethylene oxide is synthesized by the solution-phase reaction method with an improved ionic conductivity up to 9.4 × 10-5 S/cm at room temperature. Moreover, polyethylene oxide polymer layer is wrapped homogeneously on the surface of Na3PS4 particles, which could effectively avoid the direct contact between Na3PS4 electrolyte and sodium metal, thus alleviate their side reactions. We demonstrate that all-solid-state battery SnS2/Na with the composite solid electrolyte Na3PS4-polyethylene oxide delivers an enhanced electrochemical performance with 230 m Ah/g after 40 cycles.展开更多
本文以大连海参为研究对象,使用了3C调查法、4Ps营销理论,根据现有资料和文献进行调查,得出目前部分大连海参企业还存在产品定位重复、定位模糊、销售渠道单一、价格弹性较差、线上平台广告投放较少等问题,针对这些问题,笔者深入研究消...本文以大连海参为研究对象,使用了3C调查法、4Ps营销理论,根据现有资料和文献进行调查,得出目前部分大连海参企业还存在产品定位重复、定位模糊、销售渠道单一、价格弹性较差、线上平台广告投放较少等问题,针对这些问题,笔者深入研究消费者行为学、品牌营销、新零售等相关理论,并将这些理论与大连海参产业的实际情况相结合,提出更有针对性和创新性的营销策略。This study focuses on the local specialty from the author’s hometown—Dalian sea cucumber—as the research subject. Utilizing the 3C Analysis Model (Customer, Competitor, Company) and the 4Ps Marketing Theory (Product, Price, Place, Promotion), the paper investigates existing data and literature reviews to identify current challenges faced by Dalian sea cucumber enterprises. Key issues include repetitive and ambiguous product positioning, single sales channels, poor price elasticity, and insufficient online advertising. To address these problems, the author proposes targeted strategies through customer segmentation, SWOT analysis (strengths, weaknesses, opportunities, threats), competitive threat assessment, dynamic pricing mechanisms, and omnichannel sales development. This study conducts an in-depth investigation into theoretical frameworks encompassing consumer behavior, brand marketing, and new retail strategies. By systematically integrating these theoretical foundations with the operational realities of Dalian’s sea cucumber industry, the research proposes targeted and innovative marketing approaches to address industry-specific challenges.展开更多
The sulfide solid electrolytes have the characteristics of high ionic conductivity and low grain boundary resistance, which make them suitable for bulk-type all-solid-state batteries. However, most of them suffer from...The sulfide solid electrolytes have the characteristics of high ionic conductivity and low grain boundary resistance, which make them suitable for bulk-type all-solid-state batteries. However, most of them suffer from poor stability in air. Here, we explore the air stable sulfide solid electrolytes in Li4-xSbxSn1-xS4 system. The solid solutions of Li4-xSbxSn1-xS4(0 ≤ x ≤ 0.5) can be formed in Li4-xSbxSn1-xS4 system. Li3.8 Sb0.2 Sn0.8 S4 achieves the highest ionic conductivity of 3.5 × 10-4 S cm-1 in this system,which is 5 times as that of Li4 Sn S4 and 3 orders of magnitude higher than that of Li3 Sb S4, respectively. Li3.8 Sb0.2 Sn0.8 S4 crystallizes into the same structure with high ionic conductivity phase of β-Li3 PS4. Moreover, Li3.8 Sb0.2 Sn0.8 S4 owns good stability in humid air. Matching with LiCoO2 and Li4 Ti5 O12,Li3.8 Sb0.2 Sn0.8 S4 exhibits the potential to be applied in all-solid-state batteries.展开更多
Fe_3O_4/PS magnetic particles with core/shell structure has been prepared in the presence of Fe3O4 magnetic fluid in ethanol/water mixture.Magnetic particles with diameter size range from 5. 54 t0 187. 32 μm were obt...Fe_3O_4/PS magnetic particles with core/shell structure has been prepared in the presence of Fe3O4 magnetic fluid in ethanol/water mixture.Magnetic particles with diameter size range from 5. 54 t0 187. 32 μm were obtained by different reaction conditions.Some parameters such as ethanol, PEG and monomer which affect particle size diameter and size distribution are discussed briefly in this paper.展开更多
基金funding support from 1000 Talent Plan program(NO.31370086963030)research projects from Shandong Province(2018JMRH0211,2017CXGC1010 and 2016GGX104001)+2 种基金Taishan Scholar Program(11370085961006)the National Science Foundation of Shandong Province(ZR2017MEM002)the Fundamental Research Funds of Shandong University(201810422046,2017JC010,2017JC042,and 2016JC005)。
文摘High ionic conductivity and superior interfacial stability of solid electrolytes at the electrodes are crucial factors for high-performance all-solid-state sodium batteries. Herein, a composite solid electrolyte Na3PS4-polyethylene oxide is synthesized by the solution-phase reaction method with an improved ionic conductivity up to 9.4 × 10-5 S/cm at room temperature. Moreover, polyethylene oxide polymer layer is wrapped homogeneously on the surface of Na3PS4 particles, which could effectively avoid the direct contact between Na3PS4 electrolyte and sodium metal, thus alleviate their side reactions. We demonstrate that all-solid-state battery SnS2/Na with the composite solid electrolyte Na3PS4-polyethylene oxide delivers an enhanced electrochemical performance with 230 m Ah/g after 40 cycles.
文摘本文以大连海参为研究对象,使用了3C调查法、4Ps营销理论,根据现有资料和文献进行调查,得出目前部分大连海参企业还存在产品定位重复、定位模糊、销售渠道单一、价格弹性较差、线上平台广告投放较少等问题,针对这些问题,笔者深入研究消费者行为学、品牌营销、新零售等相关理论,并将这些理论与大连海参产业的实际情况相结合,提出更有针对性和创新性的营销策略。This study focuses on the local specialty from the author’s hometown—Dalian sea cucumber—as the research subject. Utilizing the 3C Analysis Model (Customer, Competitor, Company) and the 4Ps Marketing Theory (Product, Price, Place, Promotion), the paper investigates existing data and literature reviews to identify current challenges faced by Dalian sea cucumber enterprises. Key issues include repetitive and ambiguous product positioning, single sales channels, poor price elasticity, and insufficient online advertising. To address these problems, the author proposes targeted strategies through customer segmentation, SWOT analysis (strengths, weaknesses, opportunities, threats), competitive threat assessment, dynamic pricing mechanisms, and omnichannel sales development. This study conducts an in-depth investigation into theoretical frameworks encompassing consumer behavior, brand marketing, and new retail strategies. By systematically integrating these theoretical foundations with the operational realities of Dalian’s sea cucumber industry, the research proposes targeted and innovative marketing approaches to address industry-specific challenges.
基金supported by the National Basic Research Program of China(973 Program,2015CB258400)the Program for HUST Interdisciplinary Innovation Team(2015ZDTD021)the China Postdoctoral Science Foundation Grant(2017M622422)。
文摘The sulfide solid electrolytes have the characteristics of high ionic conductivity and low grain boundary resistance, which make them suitable for bulk-type all-solid-state batteries. However, most of them suffer from poor stability in air. Here, we explore the air stable sulfide solid electrolytes in Li4-xSbxSn1-xS4 system. The solid solutions of Li4-xSbxSn1-xS4(0 ≤ x ≤ 0.5) can be formed in Li4-xSbxSn1-xS4 system. Li3.8 Sb0.2 Sn0.8 S4 achieves the highest ionic conductivity of 3.5 × 10-4 S cm-1 in this system,which is 5 times as that of Li4 Sn S4 and 3 orders of magnitude higher than that of Li3 Sb S4, respectively. Li3.8 Sb0.2 Sn0.8 S4 crystallizes into the same structure with high ionic conductivity phase of β-Li3 PS4. Moreover, Li3.8 Sb0.2 Sn0.8 S4 owns good stability in humid air. Matching with LiCoO2 and Li4 Ti5 O12,Li3.8 Sb0.2 Sn0.8 S4 exhibits the potential to be applied in all-solid-state batteries.
文摘Fe_3O_4/PS magnetic particles with core/shell structure has been prepared in the presence of Fe3O4 magnetic fluid in ethanol/water mixture.Magnetic particles with diameter size range from 5. 54 t0 187. 32 μm were obtained by different reaction conditions.Some parameters such as ethanol, PEG and monomer which affect particle size diameter and size distribution are discussed briefly in this paper.
