Thermal and electrochemical behaviour of C/LixCoO2 cell during safety test

Silicon Based Composite Anode for Lithium Ion Battery

“…This part of the discussion has made clear that any one composite that is prepared with carbon coating, insito generated innert phases with or without nano-active silicon particle produced during charge/discharge process deliver better electrochemical performances. In the following sub headings the research contributions of the authors on the topic 'Silicon composite anode for lithium ion batteries' has been presented (Doh et al, Jan 2008, April 2008, June 2008, May 2010Veluchamy et al, Feb 2009, April 2009 …”

Thermo-Chemical Process Associated with Lithium Cobalt Oxide Cathode in Lithium Ion Batteries

“…Several researchers made in-depth study to understand the nature of the SEI film, electrode material properties, abuse test behavior of the batteries and also suggested precautionary measures to be followed for safe handling of the battery. The battery becomes hazardous when there arises flow of surge current into or out of the charged cell to cause SEI film break www.intechopen.com down resulting in direct contact of the electrolyte with the electrode materials initiating exothermic chemical reactions ultimately leading to failure, bursting or bulging of the battery (Doh et al, 2008). The authors in (Richard & Dahn, 1999) point out that at elevated temperatures, the SEI film is not stable which is why a rechargeable lithium battery with a lithium metal anode is unsafe.…”

“…3. Voltage and thermal behaviour of Cell-1 on overcharge at 1 C rate, (Doh et al, 2008) As the cathode is completely de-lithiated, the cell voltage moves above 4.5V, the ionic conduction completely ceases, and the passage of current through the cell becomes purely ohmic resulting in heat generation due to I 2 R loss. The poor heat dissipation of the cell components causes an exponential increase in cell temperature (Saito et al, 1997)), which induces decomposition of Li x CoO 2 according to equation.…”

“…4 Voltage and thermal behavior of cell Cell-2 on overcharge at 3C rate, (Doh et al, 2008). (Doh et al, 2008).…”

“…This proton interacts with LiF deposit present in the SEI film and forms H 2 F 2 . The acidic species HF 2¯ formed from H 2 F 2 then reacts with Li 2 CO 3 present in SEI film making it more fragile (Lorey et al, Doh et al, 2008& Saito et al, 1997. The reactions are presented as equation (2) and (3).…”