silicon battery research in elkem
TRANSCRIPT
Advanced materials shaping the future
SILICON BATTERY RESEARCH
IN ELKEM
Elkem AS, Technology
Ragnar Tronstad
25.10.2015
Advanced materials shaping the future2
Elkem Technology, Corporate R&D
Elkem SolarElkem Carbon
Elkem Fiskaa, Kristiansand
Advanced materials shaping the future3
ELKEM HAS FOUR OPERATING DIVISIONS
Elkem CarbonLeading producer of electrode paste and other carbon products
Elkem Foundry Products Leading producer of ferrosilicon alloys for iron foundries and steel industry
5 plants in Norway, Iceland, Canada and China
SiliconesOne of the foremost fully integrated silicone manufacturers in the world
8 plant in France, Spain, UK, Italy, Germany, US, Brazil and China
5 plants in Norway, Brazil, South Africa and China
Elkem Silicon MaterialsGlobal producer and supplier of silicon, microsilica and specialty products
3 plants in Norway
Advanced materials shaping the future
• Quartz is the source of silicon, the other raw
materials are all carbon-based and used for
reducing the SiO2 to Si
• Coal, coke, wood chips and charcoal are the
most common carbon sources
• Silicon is the second most abundant element
in nature
5
THE (FERRO)SILICON PRODUCTION PROCESS
SiO2 + 2C = Si + 2CO
Carbothermic reduction of quartz (SiO2)
Advanced materials shaping the future6
SILICON IS USED IN A VARIETY OF INDUSTRIES
New product
Silicon
anodes in Li-
ion batteris
Advanced materials shaping the future8
THE LI-ION BATTERIES IS THE MOST INNOVATIVE BATTERY AREA
The majority of battery patents are filed in Japan and Korea The two graphs indicate high focus on Li-ion batteries
among car producer
Ref.: J.A.Silva, S. Oliveira, G. Távora, S. Mendonca; ”The role of innovation in the
future PV and storage markets”, EUPVSEC, Hamburg, 2015.
Advanced materials shaping the future
LI-ION BATTERY
Elkems target: To be a supplier of anode material to the Li-ion battery.
Anode material covers for 9,9 % of the material needed for production of a Li-ion battery.
Advanced materials shaping the future
SILICON IS THE ELEMENT WITH HIGHEST LI BATTERY CAPACITY POTENTIALSELKEM IS DEVELOPING A UNIQUE SILICON QUALITY FOR THIS PURPOSE
10
Silicon anodes:
Can reduce battery weight in
Tesla from 750 kg today to 300 kg
tomorrow and 100 kg
in the future
e-Si for batteries:
Lower energy consumption
for production of e-Si than
for ESS and considerably
lower than for poly-Si.
Advanced materials shaping the future
SILICON TO LI-BATTERIES
• A rapid growing market for Li-ion batteries
• Silicon has the highest capacity potentials for Li-ion
batteries, but expansion during lithiation can limit number of cycles.
• Initial R&D program has demonstrated (half-cell tests)1200 cycles and
double capacity -compared to present commercial standard values - by
using Silgrain® e-Si as anode material in Li-ion batteries.
• Further improvement of binder system and material homogeneity are
included in new R&D projects.
11
Summary: