Aspergillus　niger　is　widely　applied　in　the　fermentation　industry,　but　produce　abundant　mycelium　residues　every　year.　As　a　kind　of　solid　waste,　mycelium　residues　seriously　affect　the　environment.　How　to　manage　and　utilize　this　solid　waste　is　a　problem　for　the　fermentation　industry.　It　was　reported　that　many　kinds　of　biomass　could　be　utilized　to　produce　carbon　materials,　which　would　be　further　used　to　produce　lithium-ion　rechargeable　batteries　(LIBs).　Here,　porous　biochar　was　prepared　from　A.　niger　mycelial　residues　and　further　used　as　an　anode　for　LIBs.　Since　the　A.　niger　mycelium　contains　abundant　nitrogen　(5.29%)　from　its　chitosan-dominated　cell　wall,　and　silicon　(9.63%)　from　perlite　filter　aid,　respectively,　the　biochar　presented　an　excellent　cycle　stability　and　rate　performance　when　applied　as　the　anode　of　LIBs.　The　conclusion　of　this　research　shows　the　wide　application　prospect　of　fungal　fermentation　residues　as　carbon　precursors　in　energy　storage　devices.　Meanwhile,　this　investigation　provides　an　alternative　management　method　for　A.　niger　mycelium　residues,　with　which　the　mycelium　residues　could　be　effectively　recycled　to　avoid　resource　waste　and　environmental　pollution.　©　2023　Elsevier　Ltd