Rick Harrison and his wife Kirsten were famous scientists working for the goverment to make an energy absorbing material
One day they were experimentating on the new material and then...
They were caught in an explosion caused by the material, they were the only survivors, but they though that they were both dead, and they were separated
Rick gained the power to absorb kinetic energy and decided to use his powers for good, hoping to make his "dead" wife proud and happy. Doing this he became Livewire.
While Kirsten gained the power to absorb chemical energy. She wanted to take her anger out on the world because of her "dead" husband, not knowing that her greatest enemy would be him. In the rage, she became the Allchemist