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首页> 外文期刊>Advanced Functional Materials >A Polymetallic Metal-Organic Framework-Derived Strategy toward Synergistically Multidoped Metal Oxide Electrodes with Ultralong Cycle Life and High Volumetric Capacity
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A Polymetallic Metal-Organic Framework-Derived Strategy toward Synergistically Multidoped Metal Oxide Electrodes with Ultralong Cycle Life and High Volumetric Capacity

机译：多金属金属有机骨架衍生策略，以协同多掺杂的金属氧化物电极具有超长的循环寿命和高容量

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摘要

Metal-organic frameworks (MOFs) are very convenient self-templated precursors toward functional materials with tunable functionalities. Although a huge family of MOFs has been discovered, conventional MOF-derived strategies are largely limited to the sole MOF source based on a handful of the metal elements. The limitation in structure and functionalities greatly restrains the maximum performance of MOF-based materials for fulfilling the practical potential. This study reports a polymetallic MOF-derived strategy for easy synthesis of metal-oxide-based nanohybrids with precisely tailored multicomponent active dopants. A variety of MoO2-based nanohybrids with synergistical co-doping of W, Cu, and P are yielded by controlled pyrolysis of tailor-made polymetallic MOFs. The W doping induces the formation of MoxW1-xO2 solid solution with better activity. The homogeneous dispersion of Cu nanocrystallites in robust P-doped carbon skeleton creates a conductive network for fast charge transfer. Boosting by synergistically multidoping effect, the Mo0.8W0.2O2-Cu@P-doped carbon nanohybrids with optimized composition exhibit exceptionally long cycle life of 2000 cycles with high capacities but very slow capacity loss (0.043% per cycle), as well as high power output for lithium storage. Remarkably, the co-doping of heavy W and Cu elements in MoO2 with high density makes them particularly suitable for high volumetric lithium storage.
机译：金属有机框架（MOF）是非常方便的自模板化前体，是功能可调的功能材料的前身。尽管已经发现了大量的MOF，但传统的MOF衍生策略在很大程度上仅限于基于少量金属元素的唯一MOF源。结构和功能上的限制极大地限制了MOF基材料的最大性能，无法满足其实际应用的潜力。这项研究报告了一种多金属MOF衍生的策略，该策略可轻松合成具有精确定制的多组分活性掺杂剂的基于金属氧化物的纳米杂化物。通过量身定制的多金属MOF的热解可制得各种具有W，Cu和P协同共掺杂的基于MoO2的纳米杂化物。 W掺杂诱导形成具有更好活性的MoxW1-xO2固溶体。 Cu纳米微晶在坚固的P掺杂碳骨架中的均匀分散形成了导电网络，可实现快速电荷转移。通过协同多掺杂效应，具有优化成分的Mo0.8W0.2O2-Cu@P掺杂的碳纳米复合物表现出2000个循环的超长循环寿命，具有高容量，但容量损失非常缓慢（每个循环0.043％），以及高锂存储的功率输出。值得注意的是，在MoO2中以高密度共掺杂重元素W和Cu使它们特别适合于高容量锂存储。

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  • 来源
    《Advanced Functional Materials》 |2017年第5期|1605332.1-1605332.8|共8页
  • 作者

    Niu Shanshan; Wang Zhiyu; Zhou Tao; Yu Mingliang; Yu Mengzhou; Qiu Jieshan;

  • 作者单位

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China;

    Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, PSU DUT Joint Ctr Energy Res, Dalian 116024, Peoples R China;

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