Exploiting high-rate anode materials with fast K+diffusion is intriguing for the development of advanced potassium-ion batteries(KIBs)but remains unrealized.Here,heterostructure engineering is proposed to construct th...Exploiting high-rate anode materials with fast K+diffusion is intriguing for the development of advanced potassium-ion batteries(KIBs)but remains unrealized.Here,heterostructure engineering is proposed to construct the dual transition metal tellurides(CoTe_(2)/ZnTe),which are anchored onto two-dimensional(2D)Ti_(3)C_(2)T_(x)MXene nanosheets.Various theoretical modeling and experimental findings reveal that heterostructure engineering can regulate the electronic structures of CoTe_(2)/ZnTe interfaces,improving K+diffusion and adsorption.In addition,the different work functions between CoTe_(2)/ZnTe induce a robust built-in electric field at the CoTe_(2)/ZnTe interface,providing a strong driving force to facilitate charge transport.Moreover,the conductive and elastic Ti_(3)C_(2)T_(x)can effectively promote electrode conductivity and alleviate the volume change of CoTe_(2)/ZnTe heterostructures upon cycling.Owing to these merits,the resulting CoTe_(2)/ZnTe/Ti_(3)C_(2)T_(x)(CZT)exhibit excellent rate capability(137.0 mAh g^(-1)at 10 A g^(-1))and cycling stability(175.3 mAh g^(-1)after 4000 cycles at 3.0 A g^(-1),with a high capacity retention of 89.4%).More impressively,the CZT-based full cells demonstrate high energy density(220.2 Wh kg^(-1))and power density(837.2 W kg^(-1)).This work provides a general and effective strategy by integrating heterostructure engineering and 2D material nanocompositing for designing advanced high-rate anode materials for next-generation KIBs.展开更多
为提高邮轮建造物资物流管理水平,提出基于改进逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)与模糊贝叶斯网络的风险评估模型。采用工作分解结构-风险分解结构(work breakdown structu...为提高邮轮建造物资物流管理水平,提出基于改进逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)与模糊贝叶斯网络的风险评估模型。采用工作分解结构-风险分解结构(work breakdown structure-risk breakdown structure,WBS-RBS)全面识别物流各环节风险因素,引入改进TOPSIS剔除重要度较小的风险因素。根据事故树构建贝叶斯网络,结合梯形模糊数和Buckley法计算贝叶斯网络根节点的概率,利用其正反向推理对风险进行预测、诊断及重要度分析,找出关键风险,提出改进措施。选取国产首艘大型邮轮的暖通空调物资物流进行实证研究发现,该物资配送延迟发生概率较高,通过加强对第三方和供应商的监管和信息交互、提高计划准确性和仓储集配规范性等可快速降低风险。研究表明:该模型能有针对性地找出物流中的薄弱环节,为邮轮建造物资物流风险管理提供借鉴。展开更多
基金The authors thank the financial support from the National Natural Science Foundation of China(No.52201242 and 52250010)Natural Science Foundation of Jiangsu Province(No.BK20200386)+1 种基金Young Elite Scientists Sponsorship Program by CAST(No.2021QNRC001)the Fundamental Research Funds for the Central Universities(No.2242022R40018).
文摘Exploiting high-rate anode materials with fast K+diffusion is intriguing for the development of advanced potassium-ion batteries(KIBs)but remains unrealized.Here,heterostructure engineering is proposed to construct the dual transition metal tellurides(CoTe_(2)/ZnTe),which are anchored onto two-dimensional(2D)Ti_(3)C_(2)T_(x)MXene nanosheets.Various theoretical modeling and experimental findings reveal that heterostructure engineering can regulate the electronic structures of CoTe_(2)/ZnTe interfaces,improving K+diffusion and adsorption.In addition,the different work functions between CoTe_(2)/ZnTe induce a robust built-in electric field at the CoTe_(2)/ZnTe interface,providing a strong driving force to facilitate charge transport.Moreover,the conductive and elastic Ti_(3)C_(2)T_(x)can effectively promote electrode conductivity and alleviate the volume change of CoTe_(2)/ZnTe heterostructures upon cycling.Owing to these merits,the resulting CoTe_(2)/ZnTe/Ti_(3)C_(2)T_(x)(CZT)exhibit excellent rate capability(137.0 mAh g^(-1)at 10 A g^(-1))and cycling stability(175.3 mAh g^(-1)after 4000 cycles at 3.0 A g^(-1),with a high capacity retention of 89.4%).More impressively,the CZT-based full cells demonstrate high energy density(220.2 Wh kg^(-1))and power density(837.2 W kg^(-1)).This work provides a general and effective strategy by integrating heterostructure engineering and 2D material nanocompositing for designing advanced high-rate anode materials for next-generation KIBs.
文摘为提高邮轮建造物资物流管理水平,提出基于改进逼近理想解排序法(technique for order preference by similarity to an ideal solution,TOPSIS)与模糊贝叶斯网络的风险评估模型。采用工作分解结构-风险分解结构(work breakdown structure-risk breakdown structure,WBS-RBS)全面识别物流各环节风险因素,引入改进TOPSIS剔除重要度较小的风险因素。根据事故树构建贝叶斯网络,结合梯形模糊数和Buckley法计算贝叶斯网络根节点的概率,利用其正反向推理对风险进行预测、诊断及重要度分析,找出关键风险,提出改进措施。选取国产首艘大型邮轮的暖通空调物资物流进行实证研究发现,该物资配送延迟发生概率较高,通过加强对第三方和供应商的监管和信息交互、提高计划准确性和仓储集配规范性等可快速降低风险。研究表明:该模型能有针对性地找出物流中的薄弱环节,为邮轮建造物资物流风险管理提供借鉴。
