LiCoO2　(LCO)　lithium-ion　battery　(LIB)　is　rich　in　valuable　metals　(cobalt　and　lithium),　which　has　high　recycling　value.　The　existing　process　has　basically　realized　the　extraction　of　cobalt,　but　there　are　still　shortcomings　in　harmless　disposal　of　fluorine-containing　electrolyte,　binder　and　other　organic　matters,　selective　extraction　of　lithium　and　low-cost　extraction　of　cobalt.　In　this　context,　a　novel　process　was　developed　to　realize　the　full-component　recovery　of　spent　LiCoO2　battery　via　environmentally　friendly　pyrolysis　and　hydrometallurgical　leaching.　The　organic　matters　were　recovered　in　the　form　of　pyrolytic　oil　and　gas,　in　which　the　harmful　fluorine　element　was　absorbed　by　Ca(OH)(2)　solution.　The　current　collectors　(copper　and　aluminum)　were　recovered　after　the　easy　separation　of　electrode　materials　due　to　the　degradation　of　binders.　During　pyrolysis　the　cathode　material　was　deconstructed　and　reduced　under　the　synergistic　effect　of　pyrolytic　gas　and　anode　graphite.　Selective　recovery　of　lithium　and　cobalt　was　achieved　through　carbonated　water　leaching　and　reductant-free　acid　leaching.　The　leaching　efficiencies　of　lithium　and　cobalt　were　respectively　87.9%　and　99.1%　under　the　optimal　conditions.　Lithium　carbonate　and　cobalt　sulfate　were　obtained　by　evaporative　crystallization,　respectively.　The　remaining　residue　was　only　graphite　without　impurity　entrainment.　The　results　in　this　research　suggest　that　the　process　consisting　of　pyrolysis　and　hydrometallurgical　leaching　is　inexpensive,　efficient,　and　eco-friendly　for　full-component　recycling　of　spent　LiCoO2　battery.