BERKELEY SENSOR & ACTUATOR CENTER
UC BERKELEY UC DAVIS
User: Guest |  Site Map |  My BSAC Profile
HOME  PROJECTS  THRUSTS  PUBLICATIONS  ABOUT BSAC  DIRECTORY  ALUMNI  FOR BSAC RESEARCHERS  EVENTS CALENDAR  SECURE LOGIN
NanoTechnology: Materials, Processes & Devices
     
 

BPN742: 3D Carbon-Based Materials for Electrochemical Applications

Project ID BPN742
Website
Start Date Sat 2014-Feb-01 09:26:16
Last Updated Tue 2016-Aug-23 11:49:28
Abstract We design and develop both the electrode and electrolyte to address a new energy storage system with high energy and high power density. TiSĀ¬2 is the cheapest and lightest sulfate in the transition metal di-chalcogenide (TMDC) family, with the highest energy storage potential as lithium-ion battery anode material. In this paper, TiN coated onto carbon nanotube (CNT) by atomic layer deposition is converted to TiS2 annealing in sulfur vapor flow. Combining the high surface area and high conductivity induced by CNT and the interlayer ion storage of TiS2, the hybrid material results in a specific capacitance of ~170F/cm3 (roughly 170F/g). We introduce the salt lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) which has only been applied in Li+ battery before in aqueous supercapacitors, and prove a working voltage of 3 V which not only breaks the water splitting limit of 1.23 V but also power the energy density up to 212 Wh/kg. Cyclic voltammetry test of TiS2/CNT LiTFSI cell shows the character of supercapacitors, while TiS2 intercalation with Li+ introduce battery character instead of redox reaction in pseduocapacitors. Addressing this hybrid supercapacitor-battery, highest power density and energy density based on aqueous electrolyte. LiTFSI, the water in salt electrolyte is also dissolve in PVA/H2O gel to make semi solid state electrolyte for device assembly. Flexible supercapacitors-battery based on the LiTFSI with symmetric double electrode performs at 2.5 V with a high device projection capacitance of ~ 60mF/cm2.
Status Continuing
Funding Source BSAC Member Fees
IAB Research Area Micropower
Researcher(s) Xining Zang
Advisor(s) Liwei Lin
Detailed Information
Secure Access

Private Abstract
Research Report
Poster
Summary Slide PDF | VIDEO
Active Feedback (or Request for Response)

 

  • Copyright Notification: All papers downloaded from this site are © University of California or the publisher, all rights reserved. Contact the BSAC Webmaster for permission related to copyrighted materials.
  • Links on these pages to commercial sites do not represent endorsements by UC or its affiliates.
  • Privacy Policy
  • Contact Us

   webmaster@bsac.eecs.berkeley.edu
  User logged in as: Guest
  User Idle since: August 24, 2016, 12:38 pm