Hollow structure engineering of FeCo alloy nanoparticles electrospun in nitrogen-doped carbon enables high performance flexible all-solid-state zinc–air batteries,Sustainable Energy & Fuels

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Hollow structure engineering of FeCo alloy nanoparticles electrospun in nitrogen-doped carbon enables high performance flexible all-solid-state zinc–air batteries
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020/01/02 , DOI: 10.1039/c9se01058k
Yuanyuan Ma _{1,

2,

3,

4,

5} , Wenjie Zang _{1,

2,

3} , Afriyanti Sumboja _{6,

7,

8,

9,

10} , Lu Mao _{3,

4,

5} , Ximeng Liu _{1,

2,

3} , Mingyan Tan _{3,

4,

5} , Stephen J. Pennycook _{1,

2,

3} , Zongkui Kou _{1,

2,

3} , Zhaolin Liu _{3,

4,

5} , Xu Li _{3,

4,

5} , John Wang _{1,

2,

3}

Affiliation

Hollow-structuring of active components is among the most effective strategies for improving the kinetics of oxygen electrode catalysts, benefiting from the much-improved active surface area, enhanced accessible active sites, and formation of the desired defects on the exposed surface. Integration of active hollow nanostructures with functionalized carbon nanofibers synergizes the electrochemical performance and mechanical flexibility, which are particularly of interest for all-solid-state zinc–air batteries (FASS ZABs). In the present work, we demonstrate that the electrospinning of Prussian blue analogs can give rise to hollow FeCo alloy nanoparticles assembled in nitrogen-doped carbon nanofibers (h-FeCo alloy/N-CNFs). The h-FeCo alloy/N-CNFs thus derived exhibit superior bifunctional activities for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), and impressive performance in rechargeable Zn–air batteries. When integrated into a rechargeable FASS ZAB, they exhibit a high open circuit voltage of 1.335 V and a stable discharge–charge plateau around 1.1 V to 2.0 V, together with a large voltage efficiency of 63.5%, under bending conditions.

中文翻译：

FeCo合金纳米粒子的中空结构工程电纺成氮掺杂的碳，可实现高性能的柔性全固态锌-空气电池

活性成分的空心结构是改善氧电极催化剂动力学的最有效策略之一，这得益于大大改善的活性表面积，增强的可及活性部位以及在暴露的表面上形成所需的缺陷。活性中空纳米结构与功能化的碳纳米纤维的整合可增强电化学性能和机械柔韧性，这对于全固态锌-空气电池（FASS ZAB）尤为重要。在目前的工作中，我们证明了普鲁士蓝类似物的电纺丝可以产生组装在掺氮碳纳米纤维（h-FeCo合金/ N-CNFs）中的空心FeCo合金纳米颗粒。由此得到的h-FeCo合金/ N-CNF对氧气析出反应（OER）和氧还原反应（ORR）表现出优异的双功能活性，并且在可充电Zn-空气电池中具有令人印象深刻的性能。当集成到可充电FASS ZAB中时，它们在弯曲条件下展现出1.335 V的高开路电压和1.1 V至2.0 V左右的稳定的放电-充电平稳期，以及63.5％的大电压效率。

更新日期：2020-03-31

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