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

Abstract Influence of carboxymethylcellulose sodium salt (CMC) and carboxymethylcellulose-formate (CMC-f) binders on the cyclability of a MgH 2 –33.3% CMC type binder–33.3%C t , 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 0.5 V vs. Li + /Li° which is suitable for the negative electrode in lithium-ion batteries. Moreover, addition of CMC or CMC-f binder with C t , 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 MgH 2 –18%C t , x after 40 cycles.

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