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Plane-controlled growth strategy improves electrochemical performance of cobalt-free liNi0.9Mn0.1O2 cathode

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Progress in Natural Science:Materials International 2024年第3期34卷 569-577页

作者： Hao Tong Xun Yuan Ningbo Qin Yaocong Han Yan Cheng Fangli Ji Ruirui Tuo Changlang liang Yi Wang Qilin Tong zhaozhe Yu Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic Technology Guangxi CNGR New Energy Science & Technology Co. LTD. Guangxi Institute of Science and Technology Development Co. LTD. School of Chemistry and Chemical Engineering Guangxi Minzu University

The ultra-high nickel-layered cathodes（Ni ≥ 90 %） has garnered significant attention due to its high specific capacity. However, the widespread application of ultra-high nickel-layered cathodes still suffers limitation by structural instability and poor rate performance. Herein, a crystal-face-induced strategy is proposed to enhance rate and cycling performances of the electrode by constructing rapid li+diffusion channel and reducing internal grain boundaries of secondary particles. The crystal-face-induced strategy facilitates the growth of {010} lattice plane. Highly exposed {010} planes provide wide-open and unobstructed channels for li+deintercalation/intercalation, enhances the electrode diffusion kinetics, and thus improves the electrode rate performance. In addition, this strategy promotes the primary particle growth, reduces the grain boundaries of secondary particles and mitigates the electrode/electrolyte interface side reactions, enhancing the structural stability and cycling life of the electrode. Accordingly, the modified sample achieved a reversible specific capacity of 198.3 mAh g-1at 1 C(1 C = 180 mA g-1) and maintained a capacity retention rate of 88.5 % after 100 cycles, higher than that of the original sample(73.6 %, 146 mAh g-1). At the high rate of 5 C, it can maintain a high specific capacity of 178mAh g-1（capacity retention rate of 99 %） after 150 cycles. This work is a leap in ultra-high nickel-layered cathodes development and provides insights into the design of electrode materials for other batteries.

关键词： Cobalt-free nickel-rich cathode lithium-ion battery Plane-controlled growth strategy Rate and cycling performances

Synergistic strategy of surface-induced spinel structure and F doping to improve the electrochemical performance of li-rich cathodes

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Progress in Natural Science:Materials International 2024年第3期34卷 524-531页

作者： Yuezhen Wang Ningbo Qin Xun Yuan Shiming Qiu Fangli Ji Ruirui Tuo Tingfeng Guan Cheng Yang Jiang Zhu Miao Ge Hui Wang Yan Cheng zhaozhe Yu Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic Technology Guangxi Institute of Science and Technology Development Co. Ltd. Guangxi CNGR New Energy Science & Technology Co. Ltd. Guangxi Key Laboratory for High-value Utilization of Manganese Resources Guangxi Minzu Normal University

li-rich Mn-based materials provide higher capacity than commercial NCM layered materials due to the synergistic redox effect of cations and anions. However, lattice straining and structural collapse caused by the irreversible oxygen release at high voltage range during cycling, which results in severe capacity and voltage decay. Herein, a synergistic strategy of surface-induced spinel structure and F doping is provided to improve the structural stability. The surface spinel structure helps to reduce the structural collapse caused by electrolyte corrosion on the cathode and effectively inhibits voltage decay resulted from structural evolution. The stronger Mn-F bonds are formed by F doping to inhibit migration of transition metal(TM) and induce the uniform deposition of li F to form the thinner and more stable CEI on the cathode. Accordingly, the designed cathode(LMNO-NF) shows remarkable cycling performance with the capacity retention of 86.68 % and voltage retention of 96.6 % for 200 cycles at 1C,higher than pristine material(68.76 % and 85.75 %). Therefore, this simple dual-modification strategy of one-step synthesis is promising for solving the structural evolution and voltage decay of li-rich Mn-based cathode materials effectively, achieving further commercialization.

关键词： F doping High cycling stability li-rich Mn-Based cathode Surface-induced spinel structure Synergistic strategy

数字经济赋能高质量发展过程中的“虹吸集聚”——来自黄河中下游城市层面的经验证据

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经济地理 2024年第1期44卷 45-56页

作者：李治国李兆哲孔维嘉中国石油大学(华东)经济管理学院山东青岛266580

现阶段数字经济蓬勃发展,已经成为推动黄河中下游地区高质量发展的关键驱动力,因此探讨二者之间的作用关系显得尤为重要。鉴于此,文章在理论探讨数字经济对黄河中下游城市高质量发展的作用路径及空间效应的基础上构建了高质量发展指标... 详细信息

现阶段数字经济蓬勃发展,已经成为推动黄河中下游地区高质量发展的关键驱动力,因此探讨二者之间的作用关系显得尤为重要。鉴于此,文章在理论探讨数字经济对黄河中下游城市高质量发展的作用路径及空间效应的基础上构建了高质量发展指标体系和数字经济发展指标体系,并利用2011—2019年黄河中下游38个地级及以上城市面板数据实证检验了数字经济对高质量发展的影响。结果表明:(1)数字经济对黄河中下游城市高质量发展的影响呈现出“先抑制后促增”的U型关系,且正向促进作用具有“边际效应”递增的非线性特征;(2)基础设施建设、技术创新能力均能够起到数字经济影响高质量发展的桥梁作用;(3)数字经济发展水平越高的地区数字经济对高质量发展的推动作用越强,表现出一定的“数字鸿沟”效应;(4)数字经济发展存在空间外溢效应,本地区数字经济的发展会吸引技术、资本等生产要素以更廉价的方式流向该区域,形成“虹吸集聚”,对邻近地区的高质量发展产生负向影响。

关键词：黄河中下游高质量发展数字经济作用路径虹吸集聚

分割还是融合:数字经济如何影响中国城乡劳动力就业市场

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贵州财经大学学报 2024年第2期 31-40页

作者：李治国孔维嘉李兆哲中国石油大学(华东)经济管理学院山东青岛266580

中国经济步入新时代后,数字经济的快速发展为城乡劳动力就业市场带来了新的挑战。区别于以往在传统经济发展情境下对城乡劳动力就业市场的研究,本文将数字经济发展与中国城乡劳动力就业市场纳入同一研究框架,以探究数字经济冲击对城乡... 详细信息

中国经济步入新时代后,数字经济的快速发展为城乡劳动力就业市场带来了新的挑战。区别于以往在传统经济发展情境下对城乡劳动力就业市场的研究,本文将数字经济发展与中国城乡劳动力就业市场纳入同一研究框架,以探究数字经济冲击对城乡劳动力就业市场的影响。在理论上,构建数字经济冲击背景下城乡边际劳动生产力分割和劳动力流动的理论模型;实证上,基于2013~2020年中国省级面板数据,检验了数字经济对城乡劳动力就业市场的影响与机制,并进一步分析了数字金融的效能。研究发现:第一,数字经济显著促进了城乡劳动力就业市场的分割,这一结论在利用多种方法进行稳健性检验后依然成立;第二,数字经济对城乡劳动力市场分割的影响具有区域异质性差异,所有制分割是数字经济推动城乡劳动力市场分割的重要条件;第三,数字经济相关产业的发展及区域产业结构的转型升级是数字经济影响城乡劳动力就业市场分割的有效机制;第四,数字金融作为产业数字化融合的典范,显著抑制了城乡劳动力就业市场分割。此结论可为探讨数字经济为城乡劳动力就业市场带来何种改变,以及带来这种改变的机制为何提供有益参考。

关键词：数字经济城乡发展劳动力就业市场分割数字金融

基于无迹卡尔曼滤波和小波分析的IMU传感器去噪技术研究

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现代电子技术 2024年第5期47卷 53-59页

作者：阳兆哲李跃忠吴光文东华理工大学机械与电子工程学院江西南昌330032

获得精确的姿态信息是跌倒检测的关键。文中在姿态角解算问题中提出一种基于无迹卡尔曼滤波和小波滤波的改进方法,通过Savitzky-Golay滤波器和小波滤波融合算法对加速度计以及陀螺仪数据进行降噪处理,利用降噪后的加速度数据对陀螺仪数... 详细信息

获得精确的姿态信息是跌倒检测的关键。文中在姿态角解算问题中提出一种基于无迹卡尔曼滤波和小波滤波的改进方法,通过Savitzky-Golay滤波器和小波滤波融合算法对加速度计以及陀螺仪数据进行降噪处理,利用降噪后的加速度数据对陀螺仪数据进行PI积分补偿,将补偿后的陀螺仪数据进行Mahony解算,其结果作为无迹卡尔曼滤波的状态信息;其次通过加速度值解算,将其结果作为无迹卡尔曼滤波的量测信息实现姿态解算。实验表明,在静态条件下,相对于常见的扩展卡尔曼滤波融合切比雪夫滤波算法,该方法使IMU传感器原始加速度计精度提高了83.3%,姿态角标准差平均减少了0.00193,能够有效地减少随机噪声。零点漂移、高斯噪声对IMU传感器姿态角信号的影响,使跌倒检测系统在复杂的环境条件下具有较高的精度以及稳定性。

关键词：跌倒检测小波滤波 Savitzky-Golay滤波器无迹卡尔曼滤波 IMU传感器姿态角

UCP3对民猪前脂肪细胞产热相关基因表达的影响

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华北农学报 2024年第3期39卷 208-214页

作者：霍秀鹏宋照哲马红汪亮刘娣郝丽东北林业大学野生动物与自然保护地学院黑龙江哈尔滨150040 黑龙江省农业科学院畜牧研究所黑龙江哈尔滨150086

为了探究解偶联蛋白3(UCP3)在民猪不同组织中的表达情况以及对民猪前脂肪细胞中线粒体相关基因和ATP合成酶相关基因表达的影响,采集1月龄民猪的背部脂肪组织作为研究材料,通过酶消化法分离前脂肪细胞进行体外培养,同时采集腋下脂肪、胸... 详细信息

为了探究解偶联蛋白3(UCP3)在民猪不同组织中的表达情况以及对民猪前脂肪细胞中线粒体相关基因和ATP合成酶相关基因表达的影响,采集1月龄民猪的背部脂肪组织作为研究材料,通过酶消化法分离前脂肪细胞进行体外培养,同时采集腋下脂肪、胸部脂肪、背部脂肪、腹股沟脂肪、肾周脂肪和肌内脂肪构建组织表达谱。通过体外转染UCP3基因的过表达载体或干扰片段的方法,采用实时荧光定量PCR技术检测MCU家族基因(MCU、MICU1、MICU2)、ATP合成酶(ATP5B、ATP5E)和1,4,5-三磷酸肌醇受体1型基因(ITPR1)的表达情况以及不同脂肪组织中UCP3基因的表达情况。结果显示:采用酶消化法可以在背部脂肪组织中快速获得足量的前脂肪细胞,细胞边缘折光性良好,边界清晰,形态与成纤维细胞相似。UCP3基因在不同脂肪组织中均有表达,在背部脂肪组织中表达量最高,在腹股沟脂肪中表达量最低。过表达UCP3基因后,MCU家族基因和ITPR1基因表达水平显著升高,ATP5B基因表达水平显著下降。干扰UCP3基因后,MCU家族基因和ITPR1基因表达水平显著降低,ATP合成酶基因表达水平显著升高。结果说明:UCP3基因在不同脂肪组织中存在表达差异,可促进MCU家族基因和ITPR1基因表达、抑制ATP5B基因表达。

关键词：民猪解偶联蛋白3 实时荧光定量PCR 前脂肪细胞产热相关基因

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隧道洞口危险事件自动化监测预警平台设计与实现

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测绘与空间地理信息 2024年第3期47卷 147-149页

作者：盛兆哲李宁王旭斌中国铁路青藏集团有限公司拉萨基础设施段西藏拉萨850000 西藏圣泊创新科技有限公司西藏拉萨850000

以拉林铁路桑珠岭隧道等典型隧道出入口为研究对象,应用高分影像和雷达影像、在线监测技术、传感器技术、图像识别技术,融入“互联网+隧道洞口”,基于三维实景技术、空间地理信息技术,结合地理信息系统、信息管理制度,建立隧道出入口危... 详细信息

以拉林铁路桑珠岭隧道等典型隧道出入口为研究对象,应用高分影像和雷达影像、在线监测技术、传感器技术、图像识别技术,融入“互联网+隧道洞口”,基于三维实景技术、空间地理信息技术,结合地理信息系统、信息管理制度,建立隧道出入口危险事件在线监测和预警系统,为超前预报危险事件提供实时技术支撑,减少交通运行安全隐患。

关键词：隧道洞口 GIS 智能预警平台在线监测

Constructing stable li-solid electrolyte interphase to achieve dendrites-free solid-state battery:A nano-interlayer/li prereduction strategy

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Nano Research 2022年第8期15卷 7180-7189页

作者： Yajun Niu zhaozhe Yu Yongjian Zhou Jiawen Tang Maoxin li Zechao Zhuang Yan Yang Xiao Huang Bingbing Tian Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic TechnologyGuilin 541004China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Department of Chemistry Tsinghua UniversityBeijing 100084China Collaborative Innovation Center for Vessel Pollution Monitoring and Control Dalian Maritime UniversityDalian 116026China

Solid-state batteries based on li and nonflammable solid-state electrolytes(SSEs)have aroused the attention of numerous researchers because of their absolute safety and potentially high energy density.Most SSEs after coming into contact with li are reduced,which leads to high interfacial charge-transfer impedance and dendrites formation.In this study,an“interlayer-li pre-reduction strategy”was proposed to solve the above problem of reduction.An intermediate layer was introduced between solid electrolyte and li,and it reacted with li to produce a stable and ion-conductive interphase.Cubic garnet-type Nb-doped li_(7)La_(3)Zr_(2)O_(12)(Nb-LLZO)was selected as an example solid electrolyte since it is characterized by high ionic conductivity,feasible preparation under ambient conditions,as well as low cost.The high impedance arising from the reduction at the Nb-LLZO|li interface has limited its application.In this paper,a nano-scale li phosphorus oxynitride(liPON)layer was deposited on the Nb-LLZO pellets through radio frequency(RF)magnetron sputtering,which pre-reacted with li in-situ to produce a lithiophilic,electronically insulating,and ionic conductive interphase.The produced interphase significantly inhibited the reduction of Nb5+against li and the formation and propagation of li dendrites.It is noteworthy that li|liPON|Nb-LLZO|liPON|li cells stably cycled for over 2,000 h without any short circuit.This study emphasizes and demonstrates the significance of the pre-conversion of modification layer between unstable SSE and li metal to improve interfacial stability.

关键词： Nb-doped li_(7)La_(3)Zr_(2)O_(12)(Nb-LLZO) conversion reaction li phosphorus oxynitride(liPON) interfacial reduction solid-state battery

li-richening strategy in li_(2)ZrCl_(6) lattice towards enhanced ionic conductivity

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Journal of Energy Chemistry 2023年第4期79卷 348-356页

作者： Haochang Zhang zhaozhe Yu Hannan Chen Yongjian Zhou Xiao Huang Bingbing Tian Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Guilin University of Electronic TechnologyGuilin 541004GuangxiChina International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060GuangdongChina

All-solid-state li batteries(ASSLBs) with solid-state electrolytes(SSEs) are exciting candidates for nextgeneration energy storage and receive considerable attention owing to their reliability. Halide SSEs are promising candidates due to their excellent stability against 4 V-class layered cathodes. Compared with li3InCl6or li_(3)ScCl_(6), the low ionic conductivity of li_(2)ZrCl_(6)(LZC) is a challenge despite its low raw-material cost. Herein, we report a family of li-Richened chloride, li_(2+2x)Zr_(1–x)MxCl_(6), which can be used in highperformance ASSLBs owing to its high ionic conductivity(up to 0.62 mS cm^(-1)). The theoretical(ab initio molecular dynamics simulations) and experimental results prove that the strategy of aliovalent substitution with divalent metals to obtain li-Richened LZC is effective in improving li^(+)conductivity in SSEs. By combining li_(2.1)Zr_(0.95)Mg_(0.05)Cl_(6)(Mg5-LZC) with a li–In anode and a liCoO_(2)cathode, a room-temperature ASSLBs with excellent long-term cycling stability(88% capacity retention at 0.3C for 100 cycles) and highrate capability(121 m A h g^(-1)at 1C) is reported. This exploratory work sheds light on improving the li^(+)conductivity of low-cost LZC-family SSEs for constructing high performance ASSLBs.

关键词： li-richening li_(2)ZrCl_(6) Halide solid electrolyte All-solid-state battery Solid electrochemistry li^(+)conductivity