Heated carbon materials were made fi om organic precursors between 550
and 1000 degrees C. High capacities for lithium were found in all of
the samples heated below 800 degrees C, which all contain substantial
hydrogen. The majority of this high capacity shows large hysteresis; t
hat is the lithium is inserted near 0 V (versus lithium metal) and rem
oved near IV. We show that the capacity exhibiting large hysteresis is
proportional to the hydrogen content of the samples. We believe that
Lithium atoms can bind quasi-reversibly on hydrogen-terminated edges o
f graphene fragments in carbonaceous materials.