In:
Advanced Energy Materials, Wiley, Vol. 7, No. 19 ( 2017-10)
Abstract:
In this study, hierarchically nanoporous pyropolymers (HN‐PPs) including numerous redox‐active heteroatoms are fabricated from polyaniline nanotubes by heating with KOH. In the large operating voltage range 1.0–4.8 V versus Li + /Li, HN‐PPs store amphicharges by a pseudocapacitive manner of Li‐ion (mainly 〈 3.0 V) and electrochemical double layer formation of anion (primarily 〉 3.0 V). Through these surface‐driven charge storage behaviors, HN‐PPs achieve a significantly high specific capacity of ≈460 mA h g −1 at 0.5 A g −1 , maintaining specific capacities of 140 mA h g −1 at a high specific current of 30 A g −1 and 305 mA h g −1 after 2000 cycles at 3 A g −1 . Furthermore, asymmetric energy storage devices based on HN‐PPs deliver a high specific energy of 265 W h kg −1 and high specific power of 5081 W kg −1 with long‐term cycling performance.
Type of Medium:
Online Resource
ISSN:
1614-6832
,
1614-6840
DOI:
10.1002/aenm.201700629
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2594556-7