Determination of the reversible and irreversible heats of a LiNi _0.8Co_0.15Al_0.05O₂/natural graphite cell using electrochemical-calorimetric technique

Electrochemical performance of the natural graphite (Mag-10)/Li half-cell, LiNi_0.8Co_0.15Al_0.05O₂/Li half-cell, and LiNi_0.8Co_0.15Al_0.05O₂/Mag-10 full-cell are discussed in terms of reversible and irreversible capacity. Heat rate profiles of these cells cycled at various current levels are studied in terms of reversible and irreversible heat generation. The experimental data show an excellent agreement with the calculated results at low and moderate current levels (≤C/5). The quantitative heat contributions of the cathode and anode to the overall cell heat generation are also determined.