As a few other folks mentioned, batoning wood is not the only technique to split wood, so one not need use their only knife. Some techniques mentioned like using wedges to aid in splitting work well once you have done them a few times. I have also found it possible to use a wedge shaped stone to split wood in small dimensions, by batoning the stone with a stick into the end of the wood. Obviously the stone needs to be worked to a cutting edge shape, and that takes some skill as does flint knaping.
Using care to baton on smaller pieces of wood to get your fire going, there would be no need to abuse the knife further with the larger pieces. Just get a fire going and feed it!
Using care to baton on smaller pieces of wood to get your fire going, there would be no need to abuse the knife further with the larger pieces. Just get a fire going and feed it!