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

Safe Aqueous-Based High-Performance TEAM : Yunfeng Lu, Professor of Chemical & Biomolecular Engineering, UCLA Electrochemical Energy Storage 
 email : luucla@ucla.edu Technology Overview Current Status 1) Status • Discovered a pseudocapacitive material with high • Scale & low-cost synthesis of the active material capacitance and rate performance • Fabricated high performance thick electrodes • To develop high-performance superbatteries from • Fabricated prototyped devices with high performance PbO 2 cathodes and the pseudocapacitive anodes 2) Next Technical • To manufacture the superbatteries using existing • Integrate with high-energy batteries (Zn-Air batteries) lead-acid-battery manufacture capability 3) Next Commercial • To construct robust affordable energy storage by • Scale production of the superbatteries integrating high-power and high-energy aqueous batteries. 4) Help Needed • Identify manufacture partner • Market the technology High-Performance Robust Affordable Superbattery Energy-Storage System Project Statistics 1 2 Award Amount $0.5M Award Timeline Nov 2013 – Mar 2015 Synergic Integration Next Stage Target 1 KW Prototype ~ $3.0M 1. Aqueous High-Power Superbatteries 2. Aqueous High-Energy Batteries Collaborations Sought EOS, GM, Johnson Controls

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High-Power Long-life Superbattery Long-life Thick Electrodes • 2V 1.2 Ah (6 piece of anode and 6 piece Thick Electrodes with area capacity up to of PbO2 cathode) 10 mAh/cm 2 • 8C Charge-Discharge Rate • 100% DOD

SuperBattery Exhibits Outstanding Charge Capability Charge Curves for Superbattery and Lead-Acid Battery Rapid Charging Capability 14 5-Min Charging increase the SOD from 12 50% to 95.5% for SuperBattery Lead-Acid Battery LA'rate Vs. Volta'battery 10 50% to 51.0% for Lead-Acid Battery 8 c9rate SuperBattery Increased State of Charge (SOD) 6 after 5 min charging (2.4 V) from 50% SOD 4 2 50.00% 0 40.00% 1 40 79 118 157 196 235 274 313 352 391 430 469 508 547 586 625 time 30.00% 45.50% SOC Method : charge the cell from 50% SOD under a 20.00% constant voltage of 2.4 V 10.00% 1.04% SuperBattery Effectively Uptakes High Current Charge 0.00% lead ¡acid volta ¡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