updated README with journal link and bib

README.md

@@ -1,6 +1,8 @@
 # electrodep
 
-Codes, data and analysis of results for the paper: "Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries" [arXiv:1907.04441](https://arxiv.org/abs/1907.04441)
+Codes, data and analysis of results for the paper: "Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries" [Proc. Natl. Acad. Sci. U.S.A.](https://www.pnas.org/content/early/2020/10/07/2008841117)
+
+The preprint is available from [arXiv:1907.04441](https://arxiv.org/abs/1907.04441)
 
 `electrodep` is a MOOSE-based application to simulate metal electrodeposition using a phase-field model
 
@@ -24,10 +26,16 @@ mpirun -np 24 ./electrodep-opt -i liqcrys_Kp_p_1.0E+01_c_1.0E+00_paper.i
 ## How to cite
 
 ```
-@article{ahmad2019dendrite,
+@article{ahmad2020dendrite,
   title={Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries},
+  elocation-id = {202008841},
   author={Ahmad, Zeeshan and Hong, Zijian and Viswanathan, Venkatasubramanian},
-  journal={arXiv:1907.04441},
-  year={2019}
+  doi = {10.1073/pnas.2008841117},
+	publisher = {National Academy of Sciences},
+  journal={Proceedings of the National Academy of Sciences},
+  issn = {0027-8424},
+	URL = {https://www.pnas.org/content/early/2020/10/07/2008841117},
+	eprint = {https://www.pnas.org/content/early/2020/10/07/2008841117.full.pdf},
+  year={2020}
 }
 ```