{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:7K37EI5MUVZHSICGWACSPCO3E2","short_pith_number":"pith:7K37EI5M","canonical_record":{"source":{"id":"1312.3615","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-12T20:31:07Z","cross_cats_sorted":[],"title_canon_sha256":"679281078a2b6310678e446cdc996b750cef68c3623195586e424054adb3b815","abstract_canon_sha256":"0b2bcb43def81d773a4dc70cfedf4fd7787cddd784a22164be3004474d3d0cae"},"schema_version":"1.0"},"canonical_sha256":"fab7f223aca572792046b0052789db268b64c180e4c47006e07c4ba807520b72","source":{"kind":"arxiv","id":"1312.3615","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3615","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3615v2","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3615","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"pith_short_12","alias_value":"7K37EI5MUVZH","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7K37EI5MUVZHSICG","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7K37EI5M","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:7K37EI5MUVZHSICGWACSPCO3E2","target":"record","payload":{"canonical_record":{"source":{"id":"1312.3615","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-12T20:31:07Z","cross_cats_sorted":[],"title_canon_sha256":"679281078a2b6310678e446cdc996b750cef68c3623195586e424054adb3b815","abstract_canon_sha256":"0b2bcb43def81d773a4dc70cfedf4fd7787cddd784a22164be3004474d3d0cae"},"schema_version":"1.0"},"canonical_sha256":"fab7f223aca572792046b0052789db268b64c180e4c47006e07c4ba807520b72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:03:31.570366Z","signature_b64":"Lj7J6lYsuNnlKp4Xp7fq6i0Ce8Wc83dTd04iGsMnMInfk/y92sPrKY+l5O5CfauBN870O0kJ3s/7C+XDChewCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fab7f223aca572792046b0052789db268b64c180e4c47006e07c4ba807520b72","last_reissued_at":"2026-05-18T03:03:31.569841Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:03:31.569841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.3615","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:03:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zcwra3/rFSf9aZ4IAimNPR8l+ieFA9hJtwte+xWkXzWlw0YqXWYXmCYp/93w1tRVNc2k8VisSTAwSMrzATTcAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:08:16.276895Z"},"content_sha256":"52d4223ee54dec0d8a19fe34301a73d95cfd44380d9f4df87c77593ff4800daf","schema_version":"1.0","event_id":"sha256:52d4223ee54dec0d8a19fe34301a73d95cfd44380d9f4df87c77593ff4800daf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:7K37EI5MUVZHSICGWACSPCO3E2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MXenes as High Capacity Electrode Materials for Metal (Li, Na, K, Ca)-ion batteries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Dequan Er, Junwen Li, Michael Naguib, Michel Barsoum, Vivek B. Shenoy, Yury Gogotsi","submitted_at":"2013-12-12T20:31:07Z","abstract_excerpt":"Two-dimensional (2D) materials can have an excellent capability to handle high rates of charge in ion batteries since metal ions need not diffuse in a 3D lattice structure. However graphene, which is the most important 2D material, is known to have no Li capacity. Herein, adsorption of Li, as well as Na, K, and Ca on Ti$_3$C$_2$, one representative MXene, is predicted by first-principles density functional calculations. In our study, we observed that these alkali ions exhibit different adsorption energy depending on the coverage. The adsorption energies of Na, K and Ca decrease as coverage inc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3615","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:03:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fdiYkgSJgTa4gNDBuls+T1WZSGo1yYXo5rZy2gYvRjpRyl8bY+A/kUejZl0hKoYKpW+7gF9sz64pKNgIpHBaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:08:16.277238Z"},"content_sha256":"939903b446403e454f853a971101746fe0eca2bab51d3b0f89d855c76e1270e0","schema_version":"1.0","event_id":"sha256:939903b446403e454f853a971101746fe0eca2bab51d3b0f89d855c76e1270e0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7K37EI5MUVZHSICGWACSPCO3E2/bundle.json","state_url":"https://pith.science/pith/7K37EI5MUVZHSICGWACSPCO3E2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7K37EI5MUVZHSICGWACSPCO3E2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T21:08:16Z","links":{"resolver":"https://pith.science/pith/7K37EI5MUVZHSICGWACSPCO3E2","bundle":"https://pith.science/pith/7K37EI5MUVZHSICGWACSPCO3E2/bundle.json","state":"https://pith.science/pith/7K37EI5MUVZHSICGWACSPCO3E2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7K37EI5MUVZHSICGWACSPCO3E2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7K37EI5MUVZHSICGWACSPCO3E2","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0b2bcb43def81d773a4dc70cfedf4fd7787cddd784a22164be3004474d3d0cae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-12T20:31:07Z","title_canon_sha256":"679281078a2b6310678e446cdc996b750cef68c3623195586e424054adb3b815"},"schema_version":"1.0","source":{"id":"1312.3615","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.3615","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"arxiv_version","alias_value":"1312.3615v2","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3615","created_at":"2026-05-18T03:03:31Z"},{"alias_kind":"pith_short_12","alias_value":"7K37EI5MUVZH","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7K37EI5MUVZHSICG","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7K37EI5M","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:939903b446403e454f853a971101746fe0eca2bab51d3b0f89d855c76e1270e0","target":"graph","created_at":"2026-05-18T03:03:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Two-dimensional (2D) materials can have an excellent capability to handle high rates of charge in ion batteries since metal ions need not diffuse in a 3D lattice structure. However graphene, which is the most important 2D material, is known to have no Li capacity. Herein, adsorption of Li, as well as Na, K, and Ca on Ti$_3$C$_2$, one representative MXene, is predicted by first-principles density functional calculations. In our study, we observed that these alkali ions exhibit different adsorption energy depending on the coverage. The adsorption energies of Na, K and Ca decrease as coverage inc","authors_text":"Dequan Er, Junwen Li, Michael Naguib, Michel Barsoum, Vivek B. Shenoy, Yury Gogotsi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-12T20:31:07Z","title":"MXenes as High Capacity Electrode Materials for Metal (Li, Na, K, Ca)-ion batteries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3615","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:52d4223ee54dec0d8a19fe34301a73d95cfd44380d9f4df87c77593ff4800daf","target":"record","created_at":"2026-05-18T03:03:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0b2bcb43def81d773a4dc70cfedf4fd7787cddd784a22164be3004474d3d0cae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-12T20:31:07Z","title_canon_sha256":"679281078a2b6310678e446cdc996b750cef68c3623195586e424054adb3b815"},"schema_version":"1.0","source":{"id":"1312.3615","kind":"arxiv","version":2}},"canonical_sha256":"fab7f223aca572792046b0052789db268b64c180e4c47006e07c4ba807520b72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fab7f223aca572792046b0052789db268b64c180e4c47006e07c4ba807520b72","first_computed_at":"2026-05-18T03:03:31.569841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:31.569841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lj7J6lYsuNnlKp4Xp7fq6i0Ce8Wc83dTd04iGsMnMInfk/y92sPrKY+l5O5CfauBN870O0kJ3s/7C+XDChewCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:31.570366Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.3615","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52d4223ee54dec0d8a19fe34301a73d95cfd44380d9f4df87c77593ff4800daf","sha256:939903b446403e454f853a971101746fe0eca2bab51d3b0f89d855c76e1270e0"],"state_sha256":"63be9f98470d737c0010e77c6d3acb4fe418e1aa91963f484e51f5663a9af052"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X1oacJLMUBOIb54OFKKID4JMJCevyUs0t4i8UwuA6WVQ3xBS8C/ucRFVxyzlCM9crKykJdENL1Rx7TiFhBRkDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:08:16.279590Z","bundle_sha256":"54431a1caaf0644f7c12c86db9241dbf515930674816b745741cf6bd56e6c934"}}