Carboxymethylcellulose and carboxymethylcellulose-formate as binders in MgH2-carbon composites negative electrode for lithium-ion batteries

Influence of carboxymethylcellulose sodium salt (CMC) and carboxymethylcellulose-formate (CMC-f) binders on the cyclability of a MgH2-33.3% CMC type binder-33.3%C-t,C-x electrodes has been investigated for the first time. These electrodes show a large reversible capacity of 1800-1900 mAh g(-1) at an average voltage of 0.5V vs. Li+/Li degrees which is suitable for the negative electrode in lithium-ion batteries. Moreover, addition of CMC or CMC-f binder with C-t,C-x carbon leads to an improved capacity retention with 240 mAh g(-1) and 542 mAh g(-1), respectively, compare to 174 mAh g(-1) for MgH2-18%C-t,C-x after 40 cycles. (C) 2010 Elsevier B.V. All rights reserved.