Boron Embedded in Metal Iron Matrix as a Novel Anode Material of Excellent Performance,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Boron Embedded in Metal Iron Matrix as a Novel Anode Material of Excellent Performance
Advanced Materials ( IF 27.4 ) Pub Date : 2018-07-11 , DOI: 10.1002/adma.201801409
Wujie Dong ₁ , Yantao Zhao ₁ , Xin Wang ₁ , Xiaotao Yuan ₁ , Kejun Bu ₂ , Chenlong Dong ₁ , Ruiqi Wang ₁ , Fuqiang Huang _{1,

2}

Affiliation

Boron, the most ideal lithium‐ion battery anode material, demonstrates highest theoretical capacity up to 12 395 mA h g⁻¹ when forming Li₅B. Furthermore, it also exhibits promising features such as light weight, considerable reserves, low cost, and nontoxicity. However, boron‐based materials are not in the hotspot list because Li₅B may only exist when B is in atomically isolated/dispersed form, while the aggregate material can barely be activated to store/release Li. At this time, an ingenious design is demonstrated to activate the inert B to a high specific capacity anode material by dispersing it in a Fe matrix. The above material can be obtained after an electrochemical activation of the precursors Fe₂B/Fe and B₂O₃/Fe. The latter harvests the admirable capacity, ultrahigh tap density of 2.12 g cm⁻³, excellent cycling stability of 3180 mA h cm⁻³ at 0.1 A g⁻¹ (1500 mA h g⁻¹) after 250 cycles, and superlative rate capability of 2650 mA h cm⁻³ at 0.5 A g⁻¹, 2544 mA h cm⁻³ at 1.0 A g⁻¹, and 1696 mA h cm⁻³ at 2.0 A g⁻¹. Highly conductive matrix promoted reversible Li storage of boron‐based materials might open a new gate for advanced anode materials.

中文翻译：

硼嵌入金属铁基体中作为一种性能优异的新型阳极材料

硼是最理想的锂离子电池负极材料，在形成Li ₅ B时显示出最高的理论容量，最高可达12 395 mA hg ^-1。此外，它还具有诸如轻量，可观储量，低成本和无毒等令人鼓舞的特性。。但是，基于硼的材料不在热点列表中，因为Li ₅ B可能仅当B以原子隔离/分散的形式存在时，而聚集的材料几乎不能被激活来存储/释放Li。此时，证明了一种巧妙的设计，可通过将惰性B分散在Fe基体中来使其活化为高比容量阳极材料。上述材料可以在前体Fe ₂ B / Fe和B ₂的电化学活化后获得。O ₃ /铁后者收获了令人称赞的容量，2.12 g cm ^-3的超高振实密度，250个循环后在0.1 A g ^-1（1500 mA hg ^-1）下具有3180 mA h cm ^-3的出色循环稳定性。毫安高厘米^-3，在0.5 A G ^-1，2544毫安高厘米^-3在1.0克^-1，和1696毫安高厘米^-3，在2.0 A克^-1。高导电性的基质促进了硼基材料的可逆锂存储，这可能为高级阳极材料打开新的大门。

更新日期：2018-07-11

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11