This is because as more and more CoO is added, {TAIL ~ the percentage} of {HEAD ~ active nickel} hydroxide in the electrode is reduced 
This is because as more and more CoO is added , { TAIL ~ the percentage } of { HEAD ~ active nickel } hydroxide in the electrode is reduced
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH