01938nas a2200217 4500008004100000022001400041245008300055210006900138260000800207300001100215490000600226520122800232653002001460653002401480653002601504653001801530653002201548100002201570700001701592856011101609 2018 eng d a2053-159100aCo9Se8 nanoparticles as high capacity anode material for lithium-ion batteries0 aCo9Se8 nanoparticles as high capacity anode material for lithium cJUL a0755100 v53 a

Present investigation deal with the facile synthesis of Co9Se8 nanoparticles (NPs) and their application as the potential anode for lithium-ion battery (LIB). The primary size of the Co9Se8 NPs can be achieved between 10 similar to 25 nm while the secondary cluster size ranging from 150 similar to 200 nm as observed by transmission electron microscope (TEM). The specific capacity of Co9Se8 NPs LIB anode can reach around similar to 610 mAhg(-1) during charging (lithium ion released from Co9Se8 nanoparticles), and -730 mAhg(-1) during discharging (lithium ion intercalated) at an applied current density of similar to 100 mAg(-1). These values are significantly higher than that of the commercial graphite anode (theoretical capacity similar to 372 mAhg(-1)). The irreversibility of Co9Se8 anode (similar to 15%) is also significantly lower than that of most metal oxides and silicon-based anodes (irreversibility ranging between 30 similar to 50% or higher for Si). The reason for superior specific capacity and low irreversibility compared to metal oxides and silicon-based materials could be owing to the stable nano-cluster size which help to reduce the diffusion path and internal resistance to lithium ion.

10airreversibility10alithium-ion battery10alithium-ion diffusion10aNanoparticles10aspecific capacity1 aKumar, Pushpendra1 aHu, Lung-Hao uhttps://library.ncl.res.in/content/co9se8-nanoparticles-high-capacity-anode-material-lithium-ion-batteries02303nas a2200289 4500008004100000022001400041245010800055210006900163260000900232300001100241490000800252520135200260653002601612653002401638653001501662653001601677653002301693100002301716700002601739700002001765700002801785700002201813700002301835700000501858700002101863856012901884 2021 eng d a0169-433200aArchitecture of NaFe(MoO4)2 as a novel anode material for rechargeable lithium and sodium ion batteries0 aArchitecture of NaFeMoO42 as a novel anode material for recharge cSEP  a1499030 v5593 a

In recent decades, particular focus has been given to enhance the capacity of LIBs and SIBs either by developing new materials or by modifying existing materials. Hence, we have demonstrated a new anode material i.e. sodium iron molybdate [NaFe(MoO4)2] for both LIBs and SIBs. NaFe(MoO4)2 has been successfully synthesized by solid-state combustion technique and tested as a promising new anode material for both LIBs and SIBs. A detailed analysis of the crystal structure has been performed using DFT calculations. NaFe(MoO4)2 crystallizes in the monoclinic phase with the space group C2/c (\#15). FESEM also shows highly crystalline monoclinic shaped crystals of micron size. When evaluated as an anode material for LIBs, NaFe(MoO4)2 electrode exhibited electrochemical capacity of 920 mAhg- 1 in the second cycle at the current density of 50 mAg-1. Though capacity decreases on further cycling, the coulombic efficiency was maintained at 99% for 50 cycles. Significantly, a high discharge capacity of 100 mAhg- 1 was maintained at a very high rate of 1 Ag-1. On the other hand, we have also tested NaFe(MoO4)2 for SIBs which shows excellent reversible specific capacity i.e. 100 mAhg- 1 at the current density of 100 mAg-1 even after 500 cycles. This novel system has shown good stability for LIBs and SIBs which is hitherto unattempted.

10aElectrochemical study10alithium-ion battery10aMorphology10aNaFe(MoO4)210aSodium-ion battery1 aTamboli, Asiya, M.1 aTamboli, Mohaseen, S.1 aPraveen, C., S.1 aDwivedi, Pravin, Kumari1 aKarbhal, Indrapal1 aGosavi, Suresh, W.1 a1 aKale, Bharat, B. uhttps://library.ncl.res.in/content/architecture-nafemoo42-novel-anode-material-rechargeable-lithium-and-sodium-ion-batteries02790nas a2200253 4500008004100000022001400041245013300055210006900188260000900257300001600266490000700282520188300289653002202172653002502194653001802219653002402237653002602261653001302287100002402300700002902324700002502353700003002378856012802408 2025 eng d a1944-824400aModulation of lithium ion transport and cycling stability using rigid and flexible urethane moieties on the backbone of polymers0 aModulation of lithium ion transport and cycling stability using  cNOV  a63784-637910 v173 a

Graphite is the anode of choice for lithium-ion batteries. Due to volume change and poor conductivity of inorganic materials, they do not show comparable performance to that of graphite. Conjugated polymers are attractive because of their modularity and ease of synthesis. Herein, we report three polymers based on diketopyrrolopyrrole (DPP) as the anode. In an energy device, stored charges are due to a diffusive and capacitive component. Increasing the capacitive component is a challenge in both organic and inorganic systems. In our polymers, we installed urethane moieties that increase the capacitive component. The excellent Li+ ion transporting urethane moiety is part of the polymer chain. The Li+ ion transport is also impacted by the packing of the polymer chain. Therefore, the DPP units and urethane moieties are connected with either an alkyl chain, phenyl or biphenyl. The polymers with either alkyl or phenyl spacers showed stable cycling stability over 4000 charge-discharge cycles. On the other hand, the specific capacity of the batteries comprising a polymer with biphenyl started decreasing after 500 charge-discharge cycles. This is due to the solubility of the polymer in the battery electrolyte. The polymer with a phenyl spacer showed a higher Li+ ion diffusion coefficient due to the space generated between the polymer chains. The X-ray photoelectron spectroscopy analysis showed that the Li+ ions are bound to carbonyls, indicating the role of urethane in the charge transport. The polymer with an alkyl spacer showed a very high specific capacity of 600 mAh/g (1500th cycle) at a current density of 0.2 A/g, which is much higher than the theoretical capacity of graphite (372 mAh/g). The charge storage in all these polymers is dominated by a capacitive component, with the highest metric of 81% shown by a polymer with an alkyl spacer.

10aCycling stability10adiketopyrrolopyrrole10ahigh capacity10alithium-ion battery10anon-conjugatedpolymer10aurethane1 aKargude, Radhakisan1 aRajendran, Prakash, Babu1 aKika, Sharmin, Percy1 aKrishnamoorthy, Kothandam uhttps://library.ncl.res.in/content/modulation-lithium-ion-transport-and-cycling-stability-using-rigid-and-flexible-urethane02195nas a2200265 4500008004100000022001400041245011700055210006900172260000800241490000700249520126700256653001201523653000801535653002401543653001801567653001401585100002901599700003401628700002901662700002001691700002601711700003001737700003001767856013201797 2026 eng d a1613-681000aOrthogonally Engineered Redox-Active Polyimide-Carbon Nanotube Hybrids for Long-Life Lithium-Ion Battery Cathode0 aOrthogonally Engineered RedoxActive PolyimideCarbon Nanotube Hyb cJAN0 v223 a

The diverse structural tunability and engineered electronic properties of organic polymers have sparked significant interest in their use as cathode materials for lithium-ion storage. Recent advances suggest that organic cathodes can serve as promising alternatives to conventional metal oxide counterparts due to their elemental abundance, safety, and high theoretical capacity. However, developing cathode materials that simultaneously exhibit high specific capacity, long cycle life, and excellent rate performance remains a critical challenge. In this study, the synthesis and application of a redox-active polyimide based on orthogonally positioned, active site-rich mellitic trianhydride (MTA) and naphthalene diimide (NDI), integrated with multi-walled carbon nanotubes (MWCNTs), referred to as MTA-NDI@CNT are reported. The pristine MTA-NDI polymer demonstrates a specific capacity of 60 mAh g-1 at a current density of 200 mA g-1 and exhibits remarkable cycling stability over 20 000 cycles. Upon hybridisation with CNT (10 wt.%), the composite (MTA-NDI@CNT) delivers a nearly threefold enhancement in specific capacity, reaching 170 mAh g-1 at 500 mA g-1, along with stable cycling performance over 1300 cycles and 60.5% capacity retention.

10acathode10aCNT10alithium-ion battery10aorthogonality10aPolyimide1 aThanasekar, Chandragopal1 aJavaregowda, Bharathkumar, H.1 aVeer, Sairam, Dnyaneshwa1 aDevasia, George1 aKrishnamurty, Sailaja1 aKrishnamoorthy, Kothandam1 aBabu, Sukumaran, Santhosh uhttps://library.ncl.res.in/content/orthogonally-engineered-redox-active-polyimide-carbon-nanotube-hybrids-long-life-lithium-ion