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Chinese Journal of Chemical Engineering 2021年第9期34卷 144-151页

作者： Huawei Zhu Haifeng Yu zhaofeng yang Hao Jiang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

The Ni-ultrahigh cathode material is one of the best choices for further increasing energy-density of lithium-ion batteries(LIBs),but they generally suffer from the poor structure stability and rapid capacity ***,the tungsten and phosphate polyanion co-doped LiNi_(0.9)Co_(0.1)O_(2)cathode materials are successfully fabricated in terms of Li(Ni_(0.9)Co_(0.7))_(1-x)W_(x)O_(2-4y)(PO_(4))_(y) by the precursor modification and subsequent *** higher bonding energy of W—O(672 kJ·mol^(-1))can extremely stabilize the lattice oxygen of Ni-rich oxides compared with Ni—O(391.6 kJ·mol^(-1))and Co—O(368 kJ·mol^(-1)).Meanwhile,the stronger bonding of Ni—(PO_(4)^(3-))***—O could fix Ni cations in the transition metal layer,and hence suppressing the Li/Ni disorder during the charge/discharge ***,the optimized Li(Ni_(0.9)Co_(0.1))_(0.99)W_(0.01)O_(1.96)(PO_4)_(0.01)delivers a remarkably extended cycling life with 95.1%retention of its initial capacity of 207.4 mA·h·g^(-1)at 0.2 C after 200 ***,the heteroatoms doping does not sacrifice the specific capacity even at different rates.

关键词： LiNi_(0.9)Co_(0.1)O_(2) Co-doping Crystal stability Cycling life Li-ion batteries

Nitrogen-doped carbon stabilized Li Fe0.5Mn0.5PO4/rGO cathode materials for high-power Li-ion batteries

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1935-1940页

作者： Haifeng Yu zhaofeng yang Huawei Zhu Hao Jiang Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Exploring high ion/electron conductive olivine-type transition metal phosphates is of vital significance to broaden their applicability in rapid-charging ***,we report an interface engineered Li Fe0.5Mn0.5PO4/rGO@C cathode material by the synergistic effects of r GO and polydopamine-derived N-doped *** well-distributed Li Fe0.5Mn0.5PO4nanoparticles are tightly anchored on r GO nanosheet benefited by the coating of N-doped carbon *** design of such an architecture can effectively suppress the agglomeration of nanoparticles with a shortened Li+transfer ***,the high-speed conducting network has been constructed by r GO and N-doped carbon,which exhibits the face-to-face contact with Li Fe0.5Mn0.5PO4nanoparticles,guaranteeing the rapid electron *** profits endow the Li Fe0.5Mn0.5PO4/rGO@C hybrids with a fast charge-discharge ability,e.g.a high reversible capacity of 105 m Ah·g^-1at 10 C,much higher than that of the Li Fe0.5Mn0.5PO4@C nanoparticles(46 mA·h·g^-1).Furthermore,a 90.8%capacity retention can be obtained even after cycling 500 times at 2 *** work gives a new avenue to fabricate transition metal phosphate with superior electrochemical performance for high-power Li-ion batteries.

关键词： Cathode materials High power density Carbon Long cycle life Li-ion batteries

Stabilizing surface chemistry and texture of single-crystal Ni-rich cathodes for Li-ion batteries

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Journal of Materials Science & Technology 2022年第30期125卷 192-197页

作者： zhaofeng yang Ling Chen Huawei Zhu Yihua Zhu Hao Jiang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

The single-crystalline Ni-rich cathodes are believed to help improve the safety of Li-ion batteries(LIBs),however,the ion-diffusion limits their high-rate performance owing to large single-crystal ***,a dual-modification strategy of surface Li_(2)TiO_(3)-coating and bulk Ti-doping has been performed to achieve high-rate single crystal LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)(NCM)*** Li-ion conductive Li_(2)TiO_(3) coating layer facilitates the Li-ion transfer and prevents the electrolyte ***,the robust Ti-O bonds stabilize the cubic close-packed oxygen framework and mitigate the Li/Ni *** synergy endows the dual-modified NCM with enhanced de-/lithiation reaction kinetics and stable surface chemistry.A high specific capacity of 128 mAh g^(-1) is delivered even at 10 C with an extended cycle *** finding is reckoned to pave the way for developing high energy density LIBs for long-range electric vehicles.

关键词： NCM811 Single-crystal Dual-modification Specific capacity Li-ion batteries

New insights into the pre-lithiation kinetics of single-crystalline Ni-rich cathodes for long-life Li-ion batteries

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Green Energy & Environment 2024年第3期9卷 556-564页

作者： Qiang Han Lele Cai zhaofeng yang Yanjie Hu Hao Jiang Chunzhong Li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Developing single-crystalline Ni-rich cathodes is an effective strategy to improve the safety and cycle life of Li-ion batteries(LIBs).However,the easy-to-loss of Li and O in high-temperature lithiation results in unsatisfactory ordered layered structure and ***,we demonstrate the synthesis of highly-ordered and fully-stoichiometric single-crystalline LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)(SC-NCM83)cathodes by the regulation of pre-lithiation *** well-balanced pre-lithiation kinetics have been proved to greatly improve the proportion of layered phase in the intermediate by inhibiting the formation of metastable spinel phase,which promoted the rapid transformation of the intermediate into highly-ordered layered SC-NCM83 in the subsequent lithiation *** coating a layer of Li_(2)O–B_(2)O_(3),the resultant cathodes deliver superior cycling stability with 90.9%capacity retention at 1C after 300 cycles in pouch-type full *** enhancement mechanism has also been *** findings exhibit fundamental insights into the pre-lithiation kinetics process for guiding the synthesis of high-quality singlecrystalline Ni-rich cathodes.

关键词： Single-crystalline cathode Ni-rich oxides Pre-lithiation Li-ion batteries Surface modification

Polymer assisted deposition of high-quality CsPbI2Br film with enhanced film thickness and stability

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Nano Research 2020年第3期13卷 684-690页

作者： Jing Wei Xi Wang Xiangyu Sun zhaofeng yang Iwan Moreels Kun Xu Hongbo Li Beijing Key Laboratory of Construction-Tailordble Advanced Functional Materials and Green Applications Experimental Center of Advanced Materials School of Material Science and EngineeringBeijing Institute cf TechnologyBeijing 100081China State Key Laboratory of Information Photonics and Optical Communications School cf Science Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Chemistry Ghent University9000 GentBelgium

Inorganic halide perovskites such as cesium lead iodide(CsPbI3)have drawn tremendous attention,as their tunable band gaps are desirable for solar cells as well as light emitting ***,due to their low Goldschmidt tolerance factor,the cubic phase of bulk CsPbX3-the variant with desirable band gap-is not stable in ambient,especially in humid ***,the low solubility of CsX in precursor makes it difficult to control the film thickness and morphology of CsPbX3,which becomes another obstacle for the practical application of inorganic ***,we report a polymer assisted deposition of high-quality CsPbI2Br film by spin-coating a polymer-blended CsPbI2Br *** long-chained polymer increases the viscosity of the solution,which enables us to achieve a ca.700-nm thick film with a low solution concentration of ***,the polymer network helps to regulate the crystallization process and provides more crystallization sites for perovskite film,reducing grain size and thus improving the film *** solar cells with the polymer network exhibit improved efficiency and reproducibility(0.72%standard deviation).Moreover,the device demonstrates excellent robustness against moisture and oxygen,and maintains 90%of its initial power conversion efficiency(PCEs)after aging 4 months in ambient *** conception of polymer incorporation into inorganic perovskite films paves a way to further increase the performance,stability and reproducibility of inorganic perovskite devices.

关键词： solar cell perovskites polymer CsPbbBr

Number rigid determinantal point processes induced by generalized Cantor sets

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Acta Mathematica Sinica,English Series 2025年

作者： zhaofeng LIN Yanqi QIU Kai WANG School of Fundamental Physics and Mathematical Sciences HIAS University of Chinese Academy of Sciences School of Mathematical Sciences Fudan University

We consider the Ghosh-Peres number rigidity of translation-invariant determinantal point processes on the real line R, whose correlation kernels are induced by the Fourier transform of the indicators of generalized Cantor sets in the unit interval. Our main results show that for any givenθ∈(0, 1), there exists a generalized Cantor set with Lebesgue measure θ, such that the corresponding determinantal point process is Ghosh-Peres number rigid.

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电力调度系统无证书数字签名技术

电力系统自动化 2013年第19期37卷 105-109页

作者：樊爱宛杨照峰常强谢丽明平顶山学院软件学院河南省平顶山市467002 贵州电网公司遵义供电局贵州省遵义市563000 平顶山学院计算机科学与技术学院河南省平顶山市467002

为了解决电力调度系统中数据传输的安全性问题,利用椭圆曲线密码系统(ECC)计算效率较高的特点,提出了基于ECC无线性对的无证书数字签名方案。该方案以离散对数问题为安全基础,由调度信任中心和调度用户共同产生私钥对和公钥对,避免了调... 详细信息

为了解决电力调度系统中数据传输的安全性问题,利用椭圆曲线密码系统(ECC)计算效率较高的特点,提出了基于ECC无线性对的无证书数字签名方案。该方案以离散对数问题为安全基础,由调度信任中心和调度用户共同产生私钥对和公钥对,避免了调度系统中证书管理复杂的缺陷;以无线性对思想为实现基础,采用ECC计算方式,提高了安全调度的执行效率。方案不仅具有调度消息的完整性、抗否认性、抗伪造型、签名的可验证性和调度身份的可验证性等特点,也能够满足电力调度的实时性要求。

关键词：电力调度安全性椭圆密码系统无证书数字签名

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决策树主分量特征优化跟踪及暂态性异常提取

科技通报 2014年第6期30卷 137-139页

作者：时合生杨照峰平顶山学院计算机科学与技术学院河南平顶山467000

为有效定位识别和提取网络流量序列的暂态性异常特征,针对网络异常流量特征扰动性和暂态性特点,提出一种基于小波分解的二叉分类回归决策树主分量特征优化跟踪特征提取算法。利用训练集建立决策树模型,采用二叉分类回归决策树模型进行... 详细信息

为有效定位识别和提取网络流量序列的暂态性异常特征,针对网络异常流量特征扰动性和暂态性特点,提出一种基于小波分解的二叉分类回归决策树主分量特征优化跟踪特征提取算法。利用训练集建立决策树模型,采用二叉分类回归决策树模型进行主分量特征优化跟踪建模,利用双正交提升小波分解得到的各层细节信号对暂态性扰动特征的敏感性,实现网络流量异常特征的定位提取和识别。仿真实验表明,改进算法的抗干扰能力和分辨率提高显著,暂态性异常特征谱图分辨能力提高,异常特征分布谱清晰可见,展示了较好的特征提取和状态识别性能。

关键词：决策树小波变换网络流量

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水分离散度评价的加湿器模糊智能控制实现

科技通报 2014年第6期30卷 176-178页

作者：杨照峰时合生平顶山学院软件学院河南平顶山467000

加湿器的控制系统是控制加湿器达到良好加湿效果的关键。提出一种水分离散度评价的智能加湿器模糊智能控制实现方法,以房间内水分湿度的最优分布为研究对象,采用模糊智能控制的思想对加湿器实现智能化的闭环控制系统,在智能控制过程中,... 详细信息

加湿器的控制系统是控制加湿器达到良好加湿效果的关键。提出一种水分离散度评价的智能加湿器模糊智能控制实现方法,以房间内水分湿度的最优分布为研究对象,采用模糊智能控制的思想对加湿器实现智能化的闭环控制系统,在智能控制过程中,依据水分离散度对系统的加湿效果进行综合评估和指导,达到最优效果。在一个3 m×3 m房间内进行加湿效果的实验验证,结果显示,采用基于水分离散度评价的智能加湿器,加湿效果的分布明显优于传统加湿器,具有很好的应用价值。

关键词：水分离散度加湿器模糊控制

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蝙蝠算法优化极限学习机的电力负荷预测模型

辽宁工程技术大学学报（自然科学版） 2016年第1期35卷 89-92页

作者：孔令春孙琼琼杨照峰平顶山学院计算机科学与技术学院河南平顶山467002 平顶山教育学院计算机科学与应用系河南平顶山467000 平顶山学院软件学院河南平顶山467002

为提高电力负荷预测的准确性,提出蝙蝠算法优化极限学习的电力负荷预测模型.首先收集电力负荷历史数据,然后采用蝙蝠算法对延迟时间和嵌入维以及极限学习的隐含层结点数目进行优化,利用电力负荷历史数据进行重构,最后采用最优隐含层结... 详细信息

为提高电力负荷预测的准确性,提出蝙蝠算法优化极限学习的电力负荷预测模型.首先收集电力负荷历史数据,然后采用蝙蝠算法对延迟时间和嵌入维以及极限学习的隐含层结点数目进行优化,利用电力负荷历史数据进行重构,最后采用最优隐含层结点数目的极限学习机建立电力负荷预测模型,并采用具体数据仿真测试.实验结果表明:模型建立了整体性能优异的电力负荷预测模型,提高了电力负荷的预测精度.

关键词：电力负荷预测精度蝙蝠算法极限学习机预测模型