LiNb3O8 as a novel anode material for lithium-ion batteries

Unveiling TiNb2O7 as an Insertion Anode for Lithium Ion Capacitors with High Energy and Power Density

“…[5,23,24] In this regard, very recently, Goodenough et al proposed TiNb 2 O 7 as an insertion anode for LIBs with an operating potential of approximately 1.5 V versus lithium and a high reversible capacity of about 300 mA h g À1 . [25][26][27] The presence of both transition metals re- [a] Dr.…”

Hydrothermal-Assisted Sintering Strategy Towards Porous- and Hollow-Structured LiNb3O8 Anode Material

“…However, in the subsequent cycles, the plateaus that exist in the first cycle are replaced by sloping curves, implying different reactions between the first and subsequent cycles. At the same time, the initial discharge capacity of the LiNb 3 O 8 sample is 285.1 mAhg −1 at 0.1 C, the largest discharge capacity reported so far for LiNb 3 O 8 anode materials [18, 19]. 4.4 Li per unit formula can be inserted into the LiNb 3 O 8 material, corresponding to a composition of Li 5.4 Nb 3 O 8 .…”

“…5. In the first cycle, two pronounced peaks (Li insertion) are observed at 1.13 and 1.30 V; the former can be attributed to the partial reduction of Nb 4+ to Nb 3+ , while the latter can be related to the full valence variation of Nb 5+ to Nb 4+ [18, 19]. As seen in Fig.…”

“…At a current rate of 0.1 C, the reversible capacity can still maintain 77.6 mAhg −1 , about 2.5 times of that of LiNb 3 O 8 samples prepared by traditional solid-state method (about 30 mAhg −1 at 0.1 C, Ref. [18]). The significant improvement of Li storage capacity can be attributed to the special porous and hollow structure of LiNb 3 O 8 sample, which provides a high density of active sites and short parallel channels for faster intercalation of Li + ions through the surface [6].…”

“…Jian et al firstly introduced LiNb 3 O 8 material prepared by a solid-state reaction as an anode for LIBs. It is found that the as-prepared LiNb 3 O 8 sample ball-milled with acetylene black (LiNb 3 O 8 -BM) largely improved the initial discharge/charge capacities (351 and 212 mAhg −1 ) than those of the as-prepared LiNb 3 O 8 sample (250 and 170 mAhg −1 ) at 0.05 C; after 50 cycles, the capacity reached 150 mAhg −1 for LiNb 3 O 8 -BM at 0.1 C, only 30 mAhg −1 for LiNb 3 O 8 sample [18]. Porous LiNb 3 O 8 nanofibers also exhibited improved capacity and cyclability in virtue of the high surface area, small nanocrystals, and porous structure with the initial discharge capacity of 241.1 mAhg −1 at 0.1 C [19].…”