Ultralight, Highly Compressible Graphene Cellular Materials with Enhanced Mechanical and Electrical Performance
Ultralight, Highly Compressible Graphene Cellular Materials with Enhanced Mechanical and Electrical Performance
复制标题
具有增强机械和电气性能的超轻、高度可压缩石墨烯多孔材料
DOI：
10.1002/cnma.202000195
复制
发表时间：
2020-05
期刊：
影响因子：
3.8
通讯作者：
Huang Fuqiang
中科院分区：
文献类型：
--
作者：
Qian Jiahao;Bi Hui;Wan Dongyun;Huang Fuqiang
传统的由氧化石墨烯化学衍生的三维石墨烯细胞材料（GCMs）存在机械强度低、塑性变形严重和导电性差的问题。本文通过乙醇酸交联剂产生大量氢键，将石墨烯纳米片自组装，成功制备了超轻、超弹性、优异的机械和导电性gcm。同时，使用乙醇-水溶液可以显著地限制水在冻结过程中转化为冰晶的体积膨胀。最终，gcm表现出约4.3 mg cm−3的超低密度，并且可以大规模制造（体积约350 cm3）。在4.3 mg cm−3 ~ 25.3 mg cm−3的整个密度范围内，gcm的最大可逆应变约为90%。杨氏模量(E)范围为13.7 kPa (ρ=4.3 mg cm−3)~ 125.1 kPa (ρ=25.3 mg cm−3)，标度为E ~ ρ2.1，指数n小于前人报道的gcm。gcm还具有约98.1 S/m （ρ=25.3 mg cm−3）的高电导率。我们的工作为制造超轻、高可压缩和导电的gcm提供了一种简便的方法，为未来在能量存储和转换、环境吸附剂等方面的潜在应用铺平了道路。
Conventional three‐dimensional graphene cellular materials (GCMs) from chemically derived graphene oxide undergo low mechanical strength, severe plastic deformation and poor electrical conductivity. Herein, ultralight, ultraelastic, excellent mechanical and electrically conductive GCMs have been successfully prepared by the self‐assembly of graphene nanosheets by extensive hydrogen bonds generated from a glycolic acid crosslinker. Meanwhile, ethanol‐water solution is used to dramatically restrict the volume expansion of water converting into ice crystal during the freeze process. Eventually, the GCMs exhibit ultralow densities of about 4.3 mg cm−3, and can be fabricated on a large scale (volume of ∼350 cm3). The GCMs have a maximum reversible strain of ca. 90% in the whole density range from 4.3 mg cm−3to 25.3 mg cm−3. Young's moduli (E) are from 13.7 kPa (ρ=4.3 mg cm−3) to 125.1 kPa (ρ=25.3 mg cm−3), with the scale ofE∼ρ2.1, and the exponent n is less than the GCMs previously reported. The GCMs also have high electrical conductivities of about 98.1 S/m (ρ=25.3 mg cm−3). Our work provides a facile method for the fabrication of ultralight, highly compressible and conductive GCMs, paving the way towards future potential applications in energy storage and conversions, adsorbents for the environment, etc.
登录
查看更多内容
新型石墨烯纳米多孔整体材料可实现出色的能量存储
影响因子：
10.8
作者：
Bi, Hui;Lin, Tianquan;Huang, Fuqiang
通讯作者：
Huang, Fuqiang
四面体连接的细胞结构的新型管状石墨烯形式
影响因子：
29.4
作者：
Bi, Hui;Chen, I-Wei;Huang, Fuqiang
通讯作者：
Huang, Fuqiang
影响因子：
16.6
作者：
Barg, Suelen;Perez, Felipe Macul;Ni, Na;Pereira, Paula do Vale;Maher, Robert C.;Garcia-Tunon, Esther;Eslava, Salvador;Agnoli, Stefano;Mattevi, Cecilia;Saiz, Eduardo
通讯作者：
Saiz, Eduardo
封装在三维石墨烯内的多孔 Fe2O3 纳米框架作为锂离子电池的高性能柔性阳极
影响因子：
17.1
作者：
Jiang, Tiancai;Bu, Fanxing;Xu, Yuxi
通讯作者：
Xu, Yuxi
影响因子：
6.7
作者：
Han, Zhuo;Tang, Zhihong;Yang, Junhe
通讯作者：
Yang, Junhe