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CHEMICAL ENGINEERING JOURNAL · 2024 · IF 13.3

Screen-printed high loading flexible Zn-PANI battery

Runfeng Yu,Yunfei Xu,Xuxian Liu,Guoxin Zhang,Huiping Du,Ze Yang,Yaqun Wang

Currently, the utilization of flexible zinc ion batteries offers significant safety advantages for flexible energy storage devices. However, the limited mass-loading of these batteries presents a challenge to their long-term operation in such devices, thereby hindering further advancements. To address this, we present a mechanically flexible zinc-ion battery featuring a screen-printed PANI cathode. This battery achieves high loading and low weight, resulting in an energy density of 1.247mAh cm −2 and a maximum mass-loading of 15.78 mg cm −2 . Notably, the battery demonstrates excellent electrochemical performance, even when subjected to challenging conditions like hammering, sewing, stretching, cutting and bending.

CAS / MDL: 62-53-3 7727-54-0 872-50-4 1330-20-7 7446-20-0 7727-21-1 24937-79-9 83-86-3

研究领域: 材料科学 · 电化学 · 能源存储

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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING · 2022 · IF 9.463

Low Weight, low thermal Conductivity, and highly efficient electromagnetic wave absorption of Three-Dimensional Graphene/SiC-nanosheets aerogel

Limeng Song,Yongqiang Chen,Qiancheng Gao,Zhe Li,Xinyue Zhang,Hailong Wang,Li Guan,Zhaoju Yu,Rui Zhang,Bingbing Fan

With the rapid development of modern information technology, high-level electromagnetic wave (EMW) absorbing materials are playing an increasingly important role in military and civilian fields. However, current EMW absorbers usually have narrow absorption bandwidths and low absorption strengths , which hinder their practical applications. Herein, lightweight aerogels with low thermal conductivity and highly efficient EMW absorption were fabricated via a sol–gel method and subsequent carbothermal reduction with a simple chemical reaction process. The as-prepared graphene/SiC-nanosheets aerogels are composed of a large number of the interconnected two-dimensional SiC nanosheets and graphene sheets with abundant micrometer-sized pores that favored impedance matching, which endows the aerogels with outstanding EMW-absorbing performance. Conductive loss and interfacial polarization further promote the EMW-absorbing of the graphene/SiC-nanosheets aerogels. In addition, the highly porous and interconnected three-dimensional graphene/SiC-nanosheets aerogel networks not only facilitate the absorption of infiltrated EM waves via multiple reflection but also effectively reduce the number of heat transmission routes in the aerogels. The as-prepared SiC/G-2 aerogel exhibites excellent EMW-absorbing property, with a RL min of −65.08 dB at a frequency of 13.20 GHz, a thickness of 3.5 mm and an EAB of 2.21 GHz. These results demonstrate that the as-prepared graphene/SiC-nanosheets aerogel is fascinating material with possible applications in high-performance EMW-absorbing and heat-insulating in the aviation and aerospace fields.

CAS / MDL: 64-17-5 7440-21-3

研究领域: 材料科学 · 电磁工程 · 航空航天工程

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Screen-printed high loading flexible Zn-PANI battery

Low Weight, low thermal Conductivity, and highly efficient electromagnetic wave absorption of Three-Dimensional Graphene/SiC-nanosheets aerogel