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Multifunctional Nanocrystalline-Assembled Porous Hierarchical Material and Device for Integrating Microwave Absorption, Electromagnetic Interference Shielding, and Energy Storage
Small ( IF 13.0 ) Pub Date : 2023-03-18 , DOI: 10.1002/smll.202208101
Lihua Yao 1, 2, 3 , Yuchang Wang 1 , Jianguo Zhao 3 , Youqi Zhu 1 , Maosheng Cao 1
Small ( IF 13.0 ) Pub Date : 2023-03-18 , DOI: 10.1002/smll.202208101
Lihua Yao 1, 2, 3 , Yuchang Wang 1 , Jianguo Zhao 3 , Youqi Zhu 1 , Maosheng Cao 1
Affiliation
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Multifunctional applications including efficient microwave absorption and electromagnetic interference (EMI) shielding as well as excellent Li-ion storage are rarely achieved in a single material. Herein, a multifunctional nanocrystalline-assembled porous hierarchical NiO@NiFe2O4/reduced graphene oxide (rGO) heterostructure integrating microwave absorption, EMI shielding, and Li-ion storage functions is fabricated and tailored to develop high-performance energy conversion and storage devices. Owing to its structural and compositional advantages, the optimized NiO@NiFe2O4/15rGO achieves a minimum reflection loss of −55 dB with a matching thickness of 2.3 mm, and the effective absorption bandwidth is up to 6.4 GHz. The EMI shielding effectiveness reaches 8.69 dB. NiO@NiFe2O4/15rGO exhibits a high initial discharge specific capacity of 1813.92 mAh g−1, which reaches 1218.6 mAh g−1 after 289 cycles and remains at 784.32 mAh g−1 after 500 cycles at 0.1 A g−1. In addition, NiO@NiFe2O4/15rGO demonstrates a long cycling stability at high current densities. This study provides an insight into the design of advanced multifunctional materials and devices and provides an innovative method of solving current environmental and energy problems.
中文翻译：
集微波吸收、电磁干扰屏蔽和储能于一体的多功能纳米晶组装多孔分层材料及器件
单一材料很少能实现包括高效微波吸收和电磁干扰 (EMI) 屏蔽以及出色的锂离子存储在内的多功能应用。在此，制备并定制了一种集微波吸收、EMI屏蔽和锂离子存储功能于一体的多功能纳米晶组装多孔分层NiO@NiFe 2 O 4 /还原氧化石墨烯（rGO）异质结构，用于开发高性能能量转换和存储器件。由于其结构和成分优势，优化后的NiO@NiFe 2 O 4/15rGO在2.3 mm的匹配厚度下实现了-55 dB的最小反射损耗，有效吸收带宽高达6.4 GHz。EMI屏蔽效能达到8.69dB。NiO@NiFe 2 O 4 /15rGO表现出1813.92 mAh g -1的高初始放电比容量，在0.1 A g -1 下循环289次后达到1218.6 mAh g -1 ，并在500次循环后保持在784.32 mAh g -1。此外，NiO@NiFe 2 O 4/15rGO 在高电流密度下表现出长循环稳定性。这项研究提供了对先进多功能材料和设备设计的见解，并提供了解决当前环境和能源问题的创新方法。
更新日期：2023-03-18
中文翻译：
集微波吸收、电磁干扰屏蔽和储能于一体的多功能纳米晶组装多孔分层材料及器件
单一材料很少能实现包括高效微波吸收和电磁干扰 (EMI) 屏蔽以及出色的锂离子存储在内的多功能应用。在此，制备并定制了一种集微波吸收、EMI屏蔽和锂离子存储功能于一体的多功能纳米晶组装多孔分层NiO@NiFe 2 O 4 /还原氧化石墨烯（rGO）异质结构，用于开发高性能能量转换和存储器件。由于其结构和成分优势，优化后的NiO@NiFe 2 O 4/15rGO在2.3 mm的匹配厚度下实现了-55 dB的最小反射损耗，有效吸收带宽高达6.4 GHz。EMI屏蔽效能达到8.69dB。NiO@NiFe 2 O 4 /15rGO表现出1813.92 mAh g -1的高初始放电比容量，在0.1 A g -1 下循环289次后达到1218.6 mAh g -1 ，并在500次循环后保持在784.32 mAh g -1。此外，NiO@NiFe 2 O 4/15rGO 在高电流密度下表现出长循环稳定性。这项研究提供了对先进多功能材料和设备设计的见解，并提供了解决当前环境和能源问题的创新方法。
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