کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1286148 1497915 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polyaniline nanofiber sponge filled graphene foam as high gravimetric and volumetric capacitance electrode
ترجمه فارسی عنوان
اسفنج پلی فنیلن نانوفیبری فوم گرافن را به عنوان الکترود خازنی گراویمتریک و حجمی پر می کند
کلمات کلیدی
فوم گرافن، اسفنج نانوفایبر پلیانیلن، الکترودهای ترکیبی سلسله مراتبی، سوپراسپتور
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Hierarchical PANI nanofiber sponge/graphene foam composite electrode reported.
• Graphene as integrated collector filled of densely-packed electroactive material.
• Sponge packing density and nanofiber morphology controlled by electrodeposition.
• High gravimetric (1474 F g−1) & volumetric (86 F cm−3) capacitance values achieved.

A 3D hierarchical porous composite structure is developed via the controlled electrodeposition of a polyaniline nanofiber sponge (PANI-NFS) that fills the pores of a chemical vapor deposited graphene foam (GF). The PANI-NFS/GF composite combines the efficient electronic transport in the GF scaffold (with 100–500 μm pore size) with the rapid diffusion of the electrolyte ions into the high-specific-surface-area and densely-packed PANI-NFS (with 100–500 nm pore size). The factor of 1000 in the pore hierarchy and the synergy between the materials, that form a supercapacitor composite electrode with an integrated extended current collector, lead to both very high gravimetric and volumetric capacitances. In particular, values of 1474 F g−1 and 86 F cm−3 for a GF filling factor of 11% (leading to an estimated value of 782 F cm−3 for 100%), respectively, are obtained at a current density of 0.47 A g−1. Moreover, the composite electrode presents a capacitance retention of 83% after 15000 cycles. This excellent behavior makes the PANI-NFS/GF composite electrodes very attractive for high-performance supercapacitors.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 317, 15 June 2016, Pages 35–42
نویسندگان
, , , , , , ,