Safe Aqueous-Based High-Performance TEAM : Yunfeng Lu, Professor of - - PowerPoint PPT Presentation

Technology Overview Current Status

Safe Aqueous-Based High-Performance Electrochemical Energy Storage


TEAM: Yunfeng Lu, Professor of Chemical & Biomolecular Engineering, UCLA email: luucla@ucla.edu

Project Statistics

Award Amount $0.5M Award Timeline Nov 2013 – Mar 2015 Next Stage Target 1 KW Prototype ~ $3.0M Collaborations Sought EOS, GM, Johnson Controls

High-Performance Superbattery

2 1

• 1. Aqueous High-Power Superbatteries
• 2. Aqueous High-Energy Batteries

Synergic Integration Robust Affordable Energy-Storage System

• Discovered a pseudocapacitive material with high

capacitance and rate performance

• To develop high-performance superbatteries from

PbO2 cathodes and the pseudocapacitive anodes

• To manufacture the superbatteries using existing

lead-acid-battery manufacture capability

• To construct robust affordable energy storage by

integrating high-power and high-energy aqueous batteries. 1) Status

• Scale & low-cost synthesis of the active material
• Fabricated high performance thick electrodes
• Fabricated prototyped devices with high performance

2) Next Technical

• Integrate with high-energy batteries (Zn-Air batteries)

3) Next Commercial

• Scale production of the superbatteries

4) Help Needed

• Identify manufacture partner
• Market the technology

Low Cost ~$16-$20/kg of the active materials with a ton-scale production (Active Carbon for capacitors $30-50/kg)

411 2.5

• 0.5
• D)#

Area Capacity: 3 mAh/cm2 Charge-Discharge Rate: 8C / 80 C

Long-Life Thick Electrodes

• 2V 1.2 Ah (6 piece of anode and 6 piece
• f PbO2 cathode)
• 8C Charge-Discharge Rate
• 100% DOD

High-Power Long-life Superbattery Long-life Thick Electrodes

Thick Electrodes with area capacity up to 10 mAh/cm2

2 4 6 8 10 12 14 1 40 79 118 157 196 235 274 313 352 391 430 469 508 547 586 625

time c9rate

LA'rate Volta'battery

1.04% 45.50% 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% SOC lead ¡acid volta ¡battery

SuperBattery Exhibits Outstanding Charge Capability

Method: charge the cell from 50% SOD under a constant voltage of 2.4 V Lead-Acid Battery SuperBattery Increased State of Charge (SOD) after 5 min charging (2.4 V) from 50% SOD SuperBattery Effectively Uptakes High Current Charge Rapid Charging Capability 5-Min Charging increase the SOD from 50% to 95.5% for SuperBattery Vs. 50% to 51.0% for Lead-Acid Battery Charge Curves for Superbattery and Lead-Acid Battery

2/3/15 ¡

Lessons Learned and Collaborations Looking For

• The best products generally are the ones with the most simple design

Rejuvenate the 150 year old lead-acid battery technology

• Need to optimize the cathode capacity
• Collaborate with lead-acid battery manufactures for production
• Collaborate with EOS (Zn-Air batteries) and GM towards high

performance storage system

• Partners with renewal energy and grid storage