Rate capability of polypyrrole (PPy) was improved through additional doping by oxygen containing functional groups introduced in the substrate of functionalized carbon cloth (FCC). The PPy deposited on surfaces of carbon fibers in FCC displayed good rate capability, 70% of its capacitance (341.2 mF cm−2 at 1 mA cm−2) can be retained when the charge/discharge current density increased 20 times to 20 mA cm−2, while the PPy deposited on untreated carbon cloth (CC) could only retain 52% of its capacitance (308.7 mF cm−2 at 1 mA cm−2). PPy/FCC also displayed excellent cycling stability, 96% of its initial capacitance can be retained after 10,000 charge/discharge cycles. The asymmetric supercapacitor (ASC) assembled by using PPy/FCC as anode and crumpled MnO2 nanosheets electrochemically deposited on carbon cloth (MnO2/CC) as cathode also displayed good rate capability. When the charge/discharge current density increased 10 times from 1 to 10 mA cm−2, the ASC can retain 79% of its volumetric capacitance (from 1.78 to 1.41 F cm−3). The ASC demonstrated a high volumetric energy density of 0.80 mWh cm−3 at 12.85 mW cm−3. After 10,000 galvanostatic charge/discharge cycles, the ASC can retain 90.7% of its capacitance, demonstrating its good cycling stability.
Journal of Power Sources – Elsevier
Published: Aug 30, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera